My boyfriends 2 girls share a bedroom,ages 9 & 12 there mothers boyfriend whom moved in about a year ago, has a son age 12/13. When he is with his father for the weekend, he sleeps on the floor in the girls bedroom, he doesn't have a room. To top it off, they let the neighbor girl 13 sleep over at the same time, on the floor with the boyfriends son. What legal grounds does the girls father have to stand on? These arangements do not seem correct to me.

I would agree. This is the age where they become very curious about everything physical. 12 & 13 year olds need some privacy. Kids in general need the space to relax and be themselves after the pressures of the day just like we adults. I believe this is an age where separate sleeping accommodation is necessary if only to give the children the space to physically and mentally chill-out, as well as get a good nights sleep.