Ex and I share a ds11. Ex can be a bit of an idiot - his way or the highway type of attitude. He is always right and doesn't take kindly to being challenged or criticised.
I've always tried to bring ds up to be kind, respectful and sensible and for the most part he is all of those things and a genuinely sweet natured boy.
However ex seems to constantly try and make him more like him. He is mean about people from their looks to their abilities (for example ds was part of a swimming competition and ex was laughing about the performance of one of the other children who didn't do so well) and encourages ds to do the same. This happens a lot from people we know in real life to people on TV. He can be very cutting and cruel.
He is a lot more laid back than me with certain safety issues such as wearing a bike helmet and just tells ds 'it'll be fine' even when I've previously told him to do something simple to keep himself safe.
Ds also recently got his first girlfriend and my ex has already made comments about how he shouldn't tie himself down to one girl and should have lots of 'birds' on the go. He's 11 ffs.
I've stopped short of undermining my ex completely by saying your dad is wrong and a moron. But as ds gets older I'm worried about how much of an influence this sort of thing is going to have on him. I don't want ex to try and change ds personality and make him like him. Sometimes when he's been with his dad for a long weekend he comes home and I see a change in his attitude and behaviour. How would you handle this?