LOL Don't let B.B make you feel guilty. Missie was a 'single child' for the first two years of her life, I think it was, and she becomes a terror if I hold or pay attention to anything else now.
I wish she hadn't become so spoiled like that (so much for sharing. lol), so I'd recommend continuing to not give B.B. all the attention all the time.
You're doing great!!