"We were able to reattach Neville's severed appendage eventually, but it had been sliced off with Dark Magic," Harry explained. "It didn't work as it should have when we got it back on. Ennie was so upset about that, obviously, as it meant she'd never give Ally the brother or sister she so desperately wanted to. But she held out hope, even tried to pretend that something had just happened to kill Neville's libido. I think she was actually able to convince herself that was what had happened, in the end, to cope with everything. Eventually, we decided to make him think that, too ... as it was easier than the truth ... for them both.