Great chapter.
Really loved the way to get Ginny off of Harry's back. At first I thought Harry came up with the idea after talking to Tonks but it makes it even funnier that Harry knew nothing about it.
If you want something a bit more mean spirited for retaliation purposes I was thinking of Hermione and Daphne could hit the little slut with a spell that nullifies protections against pregnancy. With her genes she will end up pregnant and then it becomes the magical world version of Who's the Daddy as she was with multiple guys and none of them want to get stuck with her when they know she is a slut. Sluts are for sex not wives.
Might also work on Ron(but would be mean to the girl) since he wants to play the field for a few years get him a ball and chain right out of school.
I like that the Weasley's requested their marriage contract back publicly, it makes it so they can't try to claim it was all a misunderstanding when they have shown that they are gold digging purists at heart.
From the snide comments from Ron's direction when he thought Harry was poor I guess we found out that the frinedship with Harry was as much a matter of convenience as screwing Hermione was.
Can't wait for Harry to show Daphne more of the muggle world. Maybe take Tracey along so she won't worry. Harry can always bring Hermione along and then him and Daphne don't have to feel guilty for ditching since Hermione is perfectly capable of showing her around the muggle world.
More soon please.
P.S. if you need any more good cliche stories to tell Albus how about the time tuner idea or the Sirius left all the stuff he would need in his vault.