What a cutie. It's possible at that age that her nipping is due to over-stimulation. If she gets too rough or starts nipping, try giving her a time out in a quiet dark room (or crate with a cover on it). Let her rest for a while and then let her back out in the main activity area.
A friend had a kitten who would be in the hallway and get so stimulated by the activity in the living room that he would run down the hall and attack whoever was on the couch. She started doing the time outs and put him in a darkened bedroom when he got like that. He settled down real nice and stopped the attacks.