I agree with getting your family to give her treats, they should make some effort to bond with her. The only way I think it would be ok, and not mean, to keep the baby and give her away would be if you find someone who will be better to her and love her more than perhaps you and your family do. But is that possible? How many people out there are going to want a rabbit that has the issues she has with bonding etc? It will be easy to find a loving home for the baby and I would think really hard to find a loving home for the cranky adult mother. So really I think you should give her more of a chance.