group play and one couple was clearly fighting and pulled us in

belfast meet, four couples, all of us pre-vetted. one couple turned up tense, she'd been crying in the car you could tell. nobody said anything everyone just got on with the night. an hour in he started kissing my wife with this energy that wasnt sexy it was angry, like he was performing for his wife across the room. she joined in with my mate's wife with the same energy. it stopped being a sex party and started being a battlefield. we made an excuse and left at midnight. since then i cant stop thinking about her crying in the car. should we have said something when they walked in. should we be checking on her now. her partner gives me the creeps in hindsight. 38 me 36 my wife