Categories > Books > Harry Potter > What could've happened?

An Unbreakable Vow

by watmyname

What if Narcissa wanted someone else to make the vow with? What if it was Harry.

Category: Harry Potter - Rating: NC-17 - Genres: Erotica - Characters: Harry,Narcissa - Warnings: [!!] [X] - Published: 2015-05-23 - 3582 words

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A/N: This ones going to be a lot longer than both my first chapters. This one has a little more back story. I’m developing my smut writing style and I want to know what you guys think so let me know with a review or two? Did you like the short chapter,medium chapter, or the long ones? Hit me up with an idea or two if you like nothing to cliché like a quidditch threesome after a house cup win (although that might actually be in the works)
A/N: I do not own Harry Potter


S/O: @robert77833 he brought up Narcissa so I decided to write this one after looking through the books to some how bring her up.

Snape pursed his lips. He was indignant if anything. Out of all the forsaken people to trust. She trusted Potter? It’s almost as if the woman was doing it to spite him. After a quick pop he found a familiar view at Privet Drive. He walked violently up the white picket fence house. This was the last place he wanted to be before the school year started again. His robes billowed into the night as the window blew viciously. He tried to gain composure and he then walked up to the crimson door. He knocked three times before he heard a shuffle behind the door. A portly boy opened the door and looked at him with an odd look before realizing that he was one of Harry’s kind.

“Dad! One of Harry’s freak friends is at the door!” he shrieked. A violent tumbling was heard as Vernon ran down. He was amused. It was almost like watching a hippogriff run through an apothecary.

Snape let out a vehement noise before saying, “I am neither a freak nor one of Mr. Potter’s friends but I do need to see him.” He looked around the household and took note that it was immaculately clean. There were no photos of Potter anywhere. His eyebrow raised but he ignored it.

“Listen here you freak. I’ve heard enough from your lot and I will not stand for it any longer you will leave this household at once,” Vernon said shriveling. Snape took in his appearance as he said this. Vernon’s face was bright red, he was breathing heavy, and his body was trembling. He found it quite funny to watch the muggle struggle with his emotions.

“Well…if you don’t want Mr. Potter out of the house for a couple of hours so you can be by yourselves in a “normal” household for awhile then fine… be my guests,” he shrugged and began to walk off. He knew that after 3 steps the muggle would be putty in his hands. One. Two.

“Wait!” the portly man yelled. ‘Only two? You’re losing it Severus,’ he thought.

“Well what is it?” he inquired. He already knew what Vernon was about to say but he thought to ask to entertain him.

“You’ll take the boy for a few hours?” he shuffled his hands greedily.

“Of course and he will be back before you even know it,” Snape answered.

“Yes yes that’s all good of course,” he said not seeming to care at all. Snape doubted he would miss Potter if he ever came home at all. But he wasn’t there for Potter. He was there for something far more important. His thoughts were interrupted when he heard a foul shriek.
“FREAK! Get down here! One of your lot is here to take you away!”

A disheveled figure came out of the door in the shape of his rival’s son. As soon as he came out the door his two relatives ran in and slammed the door. It seemed he had grown. The familiar scar was an immediate giveaway of who it was. His bird’s nest he called hair had certainly stayed the same if not longer and wilier. He seemed bigger to Snape due to his broader shoulders but he could not tell. The boy was wearing clothes befitting of a house elves. It looked like he was wearing a sack for a shirt and pants meant for an elephant. Snape mentally ‘tsk’ed but said nothing aloud. This would not be suitable for who he was meeting. He waved his wand quickly and a pair of black robes surrounded the boy. The boy was now in a pair of black slacks a white button up and a grey crewneck sweater over it with black robes.

“Professor why are you here?” Harry questioned. “And why did you just dress me?”

“Potter I am here not here for pleasure I am here for business.” He said plainly. He clenched his fists before he had to say this but he had no other choice. Potter would not go with him otherwise.

“Potter I am here to ask you a favor,” Snape said. Harry’s eyebrows nearly shot into to the sky. Why would Snape of all people ask him for a favor? Wouldn’t he realize that Harry could just outright deny him for all the shit he gave him over the past few years? But instead of doing that he thought out all his options and decided to ask.

“What’s the favor then Professor?” inquired Harry.

“A friend of mine needs your help and your help specifically” ,he started to say, “I know we have not been anything close to friends Potter (Harry snorted) I will offer you something that you might want during the school year.

“What’s that then?” Harry asked.

“You and your small group of friends will be immune from any harassment from me for the whole entire year if you do this for me,” Snape explained. “There’s no danger here Potter just hear my friend I would not put you in danger.”

Harry mulled his options. It did sound nice to have a year without Snape acting out irrationally toward him every time he merely breathed in Hogwarts. After a minute of thinking he shrugged, “Why not?” he said, “Lets go.”
With that answer Snape took a hold of his shoulder and there was a quick pop. Harry lurched and fell forward. He was never a fan of side apparation. He quickly got up and took in his surroundings. In front of him was the most ostentatious house he had ever seen. The grounds were littered with fountains decorated with gems: rubies, emeralds, and sapphires, even diamonds! Harry quickly noticed Snape took stride without him and he ran to catch up to him. He turned to him at the door of the mansion and looked at him.

“Do not think of me asking this favor as a sign of weakness Potter,” He began to say, “You will be polite and consider the offer. I will rescind the offer the moment I hear you went sour at this meeting. Am I understood?”

Harry nodded. He wouldn’t fuck this up intentionally but if this were weird he would be the first one to run. While Snap wasn’t looking he had wandlessly summoned and shrunk his broom into his pocket.

“Go then. I will return in a couple of hours.” He said. He opened the door and ushered him in. “You will go up the long flight of stairs and go to the left wing. After you do you will enter the first door on your right. It will look like an office. She will be in there.” He explained. With that quick explanation there was another quick pop and Harry was alone.
He began to trek his way up the flights of stairs to the left wing. Ornate paintings, statues, and busts were not the uncommon scene as he made his way up. House elf after house elf ran by him bustling with housework to do he presumed. But as he walked in they started whisper and look at him. He finally made it towards the door. He opened it.
He looked around the office. It definitely had a female tone to it. There was a long mirror by the desk, several satin couches and chairs, and flowers by the window that oversaw the gardens. It was quite lavish. He started his way towards the desk and picked up what he saw was a photo. It was unclear far but it was very clear who it was in the photo. It was a family picture of the Malfoy’s this room must belong to-

“Ahem. I was unaware I had invited you into my office already Mr. Potter,” a mystery voice struck out.
Harry in shock dropped the photo and whipped his wand out in reflex. Narcissa Malfoy. He remembered her from the World Cup.

“What do you want with me?” Harry questioned.

“Relax Mr. Potter if I wanted you dead it would’ve already been done,” she said.
He relaxed his stance and he watched as she sat down onto one of the satin couches in the room. He took in her appearance and she was not sore on the eyes. Her straight platinum blonde hair fell down to her hips. Her eyes shined a cerulean blue and her high cheekbones and plump lips complimented her heart shaped face. She was wearing a black dress that hugged her figure. A deep V cut down the middle of her dress that showed off her impressive bust. There was a slit that showed much of her legs and they were a sight to see. It was almost shocking to think someone like Lucius Malfoy was able to snag a lady like her. He hardened underneath his slacks but he had to remind himself who this was. ‘Down boy’ he said mentally.

“Sit” she said.
He took a seat opposite of her still apprehensive of her.

“We have never spoken a conversation during my son’s years at Hogwarts but I must speak to you now,” she explained. “I must confess you were not the first person I thought of when I knew I needed this but you are probably the best candidate.

“In short I need you to protect my son,” she said softly.

‘Huh? From what’ he thought.

“I love my son, Harry. I don’t want him to die following a mad man and his father is almost pushing him towards that path in fact he’s already started!” She confessed.

“Why would I even protect him? I don’t even like him!” he explained. Over the years him and Malfoy hadn’t exactly been friends they couldn’t even be thought of as acquaintances. They fought every year during quidditch, in between classes, and even during class.

“I know it’s not the most amazing offer but I beg of you. I am appealing to your need to save people. You are probably the only person on this planet who can protect him from the Dark Lord,” she implored him.

“If you do this for me Harry,” she continued, “I could make it interesting for you.” She stood up and plopped down next to him. She took grabbed one of her hands and rubbed at his upper thigh dangerously close to his hard rod.

“It’s been a very long time since anyone’s satisfied me. I think we could both benefit from this agreement,” she whispered softly. She then shuffled herself so that the bottom of her dress hiked up. More of her creamy flesh showed as she rubbed him through his clothes. She pressed her bust against his shoulder and Harry could feel himself at full mast but he did not want to give in just yet.

“This could be all yours Mr. Potter, “ she began to say,” All you need to do is promise it to me.” She spat on her hand and fished his cock out of his pants. She began to stroke him. Precum oozed out of his cock as she began to pick up the pace.

“You are a big boy aren’t you”,she moaned, “Take my other hand Harry.” He wasn’t sure why he had to hold her hand but he did anyways. She pulled out her wand while he wasn’t looking.
'Will you, Harry Potter, watch over my son Draco as he attempts to fulfil the Dark Lord's wishes?'

'I will,' said Harry.

A thin tongue of brilliant flame issued from the wand and wound its way around their hands like a red-hot wire. But Harry had noticed because his eyes were closed in pure pleased as Narcissa continued to pump him. Narcissa was beginning to become wet. His cock felt so hot in her hand. She licked her lips. She had never had a cock this big in her hands and she was going to take full advantage. ‘Fuck Lucius. He hasn’t provided my any pleasure after 20 years of marriage,’ She thought.

'And will you, to the best of your ability, protect him from harm?'

'I will,' said Harry.

A second tongue of flame shot from the wand and interlinked with the first, making a fine, glowing chain.

Narcissa sped up her stroking and Harry’s breathing started to become heavy. Her hand was so soft. He began to thrust against the motions that she was making. Harry felt his orgasm imminent but when Narcissa felt it coming she quickly stopped.

“Well then Mr. Potter we must celebrate. Would you mind helping me unzip?” She asked him while standing up. Harry moaned at the loss of heat from her hand. He shook his head no violently and almost ran to the mirror to help her unzip out of the dress. He pressed his hard on into her behind as he shuffled around to find the zipper.

“My my aren’t we excited, she said while ‘accidentally’ dropping her bracelet .She bent over and pushed her arse into Harry’s delicious cock.

“I’m sorry I must have dropped something. Let me get it before we continue,” Narcissa said.

“Fuck Cissa your arse is so delectable,” Harry moaned while grinding his naked erection against her clothed butt. His hands gravitated towards her hips as he began to dry hump her. Narcissa did not mind at all. In fact she reveled in it. The savior of the Wizarding World was using her for his own sexual pleasure. It turned her on immensely. Her juices started to flow down her thighs. She had neglected to wear a bra or panties. No point in getting fresh lingerie dirty if she knew what was going to happen.

While he was dazed in pleasure he had managed to find the zipper and pulled down on it. Narcissa shimmied out of the dress and let it pool onto the floor. Her body was completely bare to him. She then took Harry’s hand and led him to her desk.

“Sit on the desk Harry,” she implored him.

He did so and as soon as he did she waved her wand and she made his clothes disappear. His cock bobbed as it was freed in the air and she looked at it impressed with its size.

“I’m sorry for teasing you earlier. Why don’t we get this huge cock of yours to cum?” she said. She then took a bottle of lotion from her desk and she sprayed it on her tits. She began to rub it oiling them up. Harry watched the whole display his eyes on her breasts the whole time. His dick was as hard as steel. She then finished oiling them up and got on her knees. She positioned herself so his cock was in between her breasts and she pushed them together. Harry groaned as he realized what she was doing. He was going to fuck her glorious tits. She began to slide her tits up and down his cock. She felt the rod in between her breasts become hotter and hotter as it became more slicked with precum. She was so wet. She opened her mouth and sucked his crown a little every time it popped out of her breasts,
Harry felt amazing as he fucked her tits. This was much better than anything he had ever done with his hand. Narcissa began to speed up her tit fuck and Harry began to tremble as his orgasm approached.

“Cissa I’m about to cum,” he gasped out.

“Than cum”, she said, “cum on these delectable tits while I swallow the rest”

Harry began to shoot several ropes of his cum onto her tits and Narcissa’s mouth soon replaced her tits as she sucked him dry. Her tongue ran over his tool to make sure that he was completely clean before she stopped and she then took her wand and made the cum on her breasts disappear. Not wanting to be outdone by her Harry lifted her by her ass plopped her onto the desk.

“I think it’s my turn to please you, Cissy,” he whispered into her ear. She shook with anticipation as Harry began to plant kisses along her neck. He began at her neck and took his time down to her collarbone. His hands ran along her sides and he was doing this and they found their way onto her breasts. He grasped one with his hand and he began to fondle it while he put the other in his mouth. As he suckled on her teat her nipples hardened. Narcissa was feeling so much pleasure she raked her hands through Harry’s hair while moaning. He then left her breasts alone and began to make his way down further. Harry quickly found her clit and he began to suckle on it. Her hips quickly began to buck but Harry held them down while sliding a finger inside of her.

"So soaked aren’t you?” Harry asked.

She moaned and said,” It is your fault. You should take care of it.”

Harry smirked. “Ask and you shall receive.”

He spread her lips with two fingers and he then started to lick her while slowly prodding her with his tongue. He had an idea though. He began to speak parseltongue as he was eating her out. He started to trace the alphabet while singing the alphabet song. Before he even reached the letter M Narcissa’s hands flew to the back of Harry’s hand as she kept him planted tongue fucking her. She began to rut against his tongue and she started to convulse.

“HARRYYY,” she screamed. Her pussy squirted out her juices into Harry’s mouth and he drank it all up. Narcissa fell backward onto her desk as she tried to catch her breath. That was singularly the best orgasm that she had ever received. They hadn’t even had sex yet! Harry was thinking along the same lines and lifted her up from her desk, sat on the desk, and had them lined up across from her mirror.

“Look Cissa.” She looked across and saw herself. Her pussy was the wettest it had ever been before and Harry’s tool was up again. Thank god for teenage virility. She took a hold of his meaty cock and lined it up with her opening. Harry then dropped her down onto his cock and her mouth clamped up as she was feeling so much pleasure. So thick. So big. She barely handled him inside her. As she adjusted she looked at Harry and he looked back. His eyes were filled with fire as he spoke two words.

“Ride me.”

She started to lift her hips and slam down in a violent manner. She began to gasp and moan as she did this keeping her hands on his shoulder as she rode him as hard as she wanted too. Harry was rising up as she slammed down and he captured her lips with his own. His hands fell down to her arse as she was riding him and he began to grope her cheeks as he thrust upwards.
“I want you to look at the mirror while I fuck you.”

She kept her eyes on the mirror as she stilled. Harry than began to fuck her. He sped up and soon he was jack hammering her. She watched as the big rod speared her over and over again. His cock was actually rubbing against her cervix. He was that fucking huge.

“Oh God. Harry I love how you’re fucking me. So fast and so rough I need more,” she moaned.
In and out. She had never felt so full and so empty so quickly. She was nearing her orgasm and she did not want to feel this hunk of a man to upstage her so she started to clench her muscle around his cock. He seemed to recognize this and pounded even faster.

“Gonna cum. Gonna fill that pussy up with my hot cum Cissa.” He said.

“Do it then. Impregnate me. You won’t cum in me I bet you won’t,” she taunted him.
These words propelled his final thrust came and he came inside her pussy so much it leaked out onto the desk. He carried her onto one of the couches and they both laid in complete content.

“I think its safe to say we might need to renew this promise every now and then Mr. Potter,” She said casually.
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