Totally not caught up with Furuba, but I can tell the way things are ending is something I'd not be comfortable with. I've noticed a surplus of large age differences in shoujo manga, and they've always been a turn off for me. However, the added 'fuckedness' of this one would make it more so. I also agree that redemption should not come easy for her.

...And on the surplus of pairings near the end. o.o