I would have just got her a self cleaning litter box. Any person who gives up a precious animal for a ridiculous reason like that, doesn't deserve an animal in the first place. So glad she has a new loving owner!
When I was growing up I had a red and white cow with a heart on her forehead, I called her Valentine. I also had a buckskin Quarter Horse named Abner who had a perfect white heart on his forehead as well.