Sister's boyfriend came over last week for a takeaway and a few beers.
After the meal we decided to crash on the sofa and watch tv. During University Challenge my sis and I were joking around at the questions/the ridiculous answers we came up with. All light hearted, we were just trying to make each other laugh really. Very much the norm for our family. Well, Sister's boyfriend leans into her multiple times genuinely angry and chastising her for talking over questions preventing him from answering (before passively aggressively rewinding). When I say it injected an awful energy into the room I am not being hyperbolic. He genuinely snapped and I was appalled but did not say anything.
Completely took me back to my childhood where my dad, who also has EXTREME anger issues, would explode out of nowhere. The sitting in awkward silence thing, makes me queasy.
I've begun to notice a pattern of behaviour which really concerns me. Always thought he was a bit boring but harmless.
I've also seen WhatsApp notifications to the effect of "PICK UP YOU FUCKING BITCH". I know now he was in a fairly serious situation but nothing my sister could directly help with as she was hundreds of miles away.
What can I do? She works in the City, is charming and lovely. Late 20s. So scared for her.