In front of DS, because DP left a glass in the living room for four days. He finally noticed it this morning, asked if it was his or mine, told him it was his because I'd put mine away the other night to which he replied "So that's been lying there for four days?" I answered "Aye, I don't know why you didn't move it". His answer was "Why didn't you move it?" I replied that I was here to tidy up after myself and DS, not DP. That's when he told me to fuck off.
I came upstairs (was coming up anyway). He shouted at me that he'd remember that when he's cooking dinner tonight (actually I'd planned to have something different to him tonight anyway so makes no difference to me, plus I'm relapsing into anorexia so any excuse not to eat is great) and slammed the door. A second later DS came up crying telling me that his dad had slammed the door and he's frightened. All because a grown man won't tidy up after himself.