Harry Potter and Hufflepuff's Curse and Secret Betrothal Bond.

This story is about Severus Snape getting his revenge on the Potters, because of whom Harry Potter ended up with, because in the beginning of this story Harry ended up together with Hermione, but thanks to Hufflepuff's curse and the secret betrothal bond. Both of them are now infertile for life, because of the bond and the curse and there is no way to break Hufflepuff's curse at all. Because there is a clause in the curse that says 'If someone travels back in time to the time of us, founders to prevent this curse then I prevent all descendants of Ravenclaw, Hufflepuff,Slytherin and Gryffindor from being able to have children at all. Which means the founders and the first founders descendants will become infertile and the magical world will die off. But the curse will still be active although dormant. Why do you think people now have sex out of wedlock, so the curse wouldn't effect them. Yes the magicals don't exist anymore because someone did this when the curse specifically said not to. Why do you think there are a bunch of divorces and annulments out there? This a romance/fanfiction fiction.