Long long story but bare bones. Bil is always lovely to me but have seen him more than once be very verbally aggressive to his gf, shouting, swearing, horribly actually
menacingly patronising etc. Family narrative (not shared by my dh) is that they are both "volatile" and this is the nature of their relationship but I've only ever seen him be like this. Last but one time felt genuinely scared as he is a big guy and seemed really out of control as we were in public and he seemed to have no idea how irrational and unacceptable his behaviour was but even more frighteningly when it stopped he apologised to me (?!) as visiting guest and explained why gf was so difficult which my mil and fil both seemed ready to agree with. I love them and couldn't work out if they were blind to it or scared as I know he has been abusive with them years ago. Anyway. This weekend it happened again and this time his parents saw the build up but not what actually happened. She is now pregnant. My dh spoke to him but bil was too drunk to respond with anything but incoherent ramble. My mil asked me the day after with just me her and fil present if bil had been nasty. I replied that he had been very nasty indeed but (truthfully) as he was so drunk and also seems to lack awareness had no idea if he intended to be so nasty as he was and thougjt he needed someone he respected and would listen to (not my dh) to really talk with him about his behaviour and maybe giving up boozing altogether as seems much calmer and nicer when sober. She started to really cry and then fil changed the subject. I don't want to get involved with their family dynamics not least of all as don't think I myself can change or improve anything but was asked a straight question and if there's a hope in hell they could help him sort himself out don't want to deny him that or worse participate in weird collective pretence that all is ok when it's very far from it. That said, I think mil is now really unhappy and clueless about what to do and so have hurt her which don't want at all. What should I have done or do now?