Hi, I just need some opinion or advice on what to do or say.
I'm a single dad, have been since ds was 4 months old (now just over2). Recently mum has, for some reason, taken an interest and she asked if she could have him one night a week, which was quite surprising but I agreed with a smile. Saturday night has been her night for the passed couple of months and I've been taking full advantage of nights off 
He goes to the most fantastic childminder but since he's been going to his mums she's said that he's not been his usual self. Playing rough with other kids and baby, off food, crying, wanting bottle all the time etc.. Throughout the week he gets better and by Friday he's perfect again but then the weekend comes...
The 2 weekends just gone she must be losing interest again as she's not picked him up and minder reports no change and perfectly happy boy..
I don't want to think I should stop him going although she is kind of one of those mums you hear the girls in the office talking about "You'll never guess this woman on Jeremy Kyle".. and whatnot
..Wow essay! Sorry!