I have two 11 week old kittens. The little girl is always licking or bathing her brother. He stands it for awhile but after ahile he gets irritated and pushes her away gently, is this typical behavior?
It is called mutual grooming, and unless she is suckling or nursing on her brother, I wouldn't worry about it. Once she is spayed that maternal instinct will be quenched a bit. But if it bothers you, you can groom a tiny bit of lemon juice onto the boy, that will stop the behavior, and make boy a bit sticky.