I haven't had her sexed yet to double check. I don't know who I would go to around here, but it is a really good idea. As for changing our minds...no, we are pretty attached to her even if she's a he. The only way I would hand her off is if she were going to a caring and dedicated home.
It sounds to me like Zuzu already has a caring and dedicated home, so enjoy. Sometimes the most delightful things in life don't start out as planned.