I also think they know that taking the moral high ground and staying quiet pisses her off more. They know that if they say anything she'll spew venom back at them relentlessly and I imagine they all left to leave the drama behind. They've all moved on and have satisfying relationships (as men annoyingly seem to do with ease generally!), so what's the point? Money? They all get child support. Also, perhaps they just don't care anymore and want nothing more to do with the drama and chaos. I know I don't give a tit about what my ex does or who he does it with. Once you're gone, you're gone!It could also be hurtful to the kids to hear details of their mother's behaviour. PA and KH seem to put their kids first.