So there's a group of 3 of us, been friends since college. Friend 1 has 2 young DSs friend 2 has 1 DD our kids are all similar ages. Friend 1 split from her husband because she found out he was involved heavily in drugs and alcohol including around their DC.
They have had previous on and off tendencies due to the drugs and drink but each time he promised he'd stopped but she found out otherwise. They've been split for a while now and she was adamant she was doing the right thing and we tried to support her. She has recently started thinking she might want him back and has hinted this to both of us. I have tried to remain un-biased in my thought and advice/opinions to her, as she tends to take things very literally. Friend 2 however is strongly trying to push her back to her estranged husband even going as far as trying to seduce him to see what he thinks about them getting back together 
I too, am also not with my DC father so I don't want my experiences to have anything to do with anything I say to friend 1. I have now withdrawn from conversations about him but friend 2 recently messaged me privately asking why I wasn't being supportive etc
Quite frankly, I'd like to shake friend 1 and remind her why they split in the first place, his lies, his betrayal, the substance abuse etc but I am not and will not. AIBU to just keep out of it and not say anything?!
Sorry that was so log and well done if you made it through!