My dd is 6, she stays with her dad every other weekend. This weekend when she came home, she told me she had slept in with her dad (nothing unusual there, they had gone to visit his mum and she is nervous sleeping on her own there), but his gf who my dd has known for a few months also shared the bed with them. I feel uncomfortable about this and have asked him not to do this again. My dd seemed ok with it though. Am I overreacting?