My female Rabbit is ?

Yes, please have mum neutered! She is trying to dominate the baby bunny. The will be terrifying for the baby and could injure the little one. As soon as the baby is old enough (around 6 months), have her neutered as well. If you don't, you'll probably find that the two will not get along and you'll end up with two separate buns. Two girl buns are hard to bond anyway, so neutering the two will certainly help.