Actually Faith is probably trying to tell Thomas that she is in charge... No fooling, that's really how buns show dominance Bunnies of the same sex too will jump each other in this manner until they settle who is boss.

Female rabbits are prone to reproductive cancers and I would urge you to have her spayed by a rabbit specialist vet as rabbits are sensitive to anesthesia. It would also calm her down and make her more loving and the odor of her urine less strong.