I would like to see this continued; preferably with the same tone as what has already been written.
I would offer one suggestion, though. I think Hermione's infatuation with Worthless should be due to hormones and monumentally bad judgment on her part instead of nefarious actions on Ron's. Ron is already worthless as is. There's no need to make him a criminal on top of that.
Glad you liked it. I've left it very ambiguous as to whether any love potions were used by anyone other than Romilda. As Hermione realised herself, she had no proof of any being used, and only suspicions. I think it's best to leave things that way as well, and readers can come to whatever conclusions they prefer.