I split up with my children's dad about a year ago. He moved on quickly and his girlfriend has a daughter. When my children go to sleep there (every other Sat night) the girlfriend sleeps in a bed with her daughter, and my girls share a bed with their dad. Do you think this is acceptable? I'm not suggesting anything untoward is going on, but surely they should have somewhere of their own to sleep? I don't really like them going as he keeps them up too late and they're a nightmare for days after, so I can't decide if he's in the wrong, or my judgement is clouded as I don't really like them going.