Recently separated and child sleeps at dads 1-2 nights per week, suspected he was having affair with childs best friends mother but both said they were only friends, child already has mental health issues. requested that ex and lady friend didnt sleep in ex family home as might upset and confuse child. Found out a bedroom has been done for lady friends child and they slept together in room next door to my son, they appear to be moving in. It has been less than 2 month since we moved out. i am worried for my 7 yr old sons mental health, as is so confusing. what do I do?