Wanda stated that they rethought making her forget the kids sometime VERY soon after her memory of them was removed, and that she was happy about it, since that made her a better person, in the Assault on Armor City West Coast Avengers Annual. We then hear approximately NOTHING about this again until Bendis! wrote that she got those memories back from Drunk Jan. I assume that Doom wiped her memories of her children again as part of his master plan revealed in Children's Crusade. That said, her OHOTMU entry chalks it up to mental instability. Eh... works either way.
So, readers are still expecting an on-panel explanation on that one, uh? Okay, well, thanks for letting me know!