Ds is 23 and has been in a relationship with A for a bit more than six months (not sure exactly tbh). A is the daughter of his line manager B and her husband C who is an alcoholic. A is a student and ds earns a very good salary.
I've always been aware that A is somewhat highly strung and ds is so laid back he probably infuriates her tbh Ds still lives at home whilst he saves for a deposit (will move out next spring) but he comes and goes as he pleases and he's close to us and we have a good relationship. A although always invited and I think made welcome (ds says she's shy) chooses either not to visit if we are at home or visits and goes straight to his room without a hello or a bye not sure why as our dd's bf is always happy around us and there has been no cross words and we have never been negative about her at all.
There have been little incidences that ds has let slip that made me concerned but again I don't ask and I don't comment unless ds asks advice. A threatens suicide, has spectacular meltdowns, he has booked holidays, weekends away, treats etc and she throws a spanner in the works but eventually after a lot of drama they go ahead although a concert and weekend away didn't.
This week and next he is staying with A whilst B and C are away primarily because A is scared of the dark and the dog needs looking after.
He has been home today and looks dreadful, I asked if he was ok because he looks pale and drawn and ill.A is at work (in a pub) and he has sneaked back without her knowing He broke down and said it's been hell A is threatening suicide, keeps grabbing knives, is drinking, won't sleep won't let ds sleep goes berserk if ds looks at his phone (I don't text or phone when he is with A because I am aware she doesn't like it but ds has many friends who do) is insanely jealous if the dog goes near ds, if ds uses the laptop (checking work emails) or even watches TV.
I advised him to call B and C and a doctor but the last time A was threatening suicide ds phoned B and she refused to come back (they weren't even far away just on a night out) to A dismissing it as attention seeking. Today ds let slip that B is much like A and he's desperately looking for a new job because there will be hell to pay when he ends the relationship.
He's gone back now because if A leaves work unexpectedly (she does this) and realises he's come home she will go ballistic.
I am so worried for him and don't know what to do, I can't text or phone because it antagonises A and makes it worse for ds but I am worried he will get hurt. He won't leave her whilst B and C are away and they won't come home so he's trapped. I've told him to resign and we'll help him until he gets something new but to do it quickly and get away from the family but ds is proud and independent so wants to sort it himself.
What, if anything, can I advise ds to do?