DS (2.5) saw his dad today, and when he dropped him back I asked DS what he'd been doing today as I usually do, and he said 'I saw Auntie ***' - which is the filthy little slag ex cheated on me with. I am over him and if it were another girl I wouldn't mind but she knew we were together and she went after him anyway while I had PND and I have since tried to be civil, even friendly to ex, even though I hate him, for DS's sake, but to hear DS call HER Auntie just made me so bloody furious that I just walked away with DS and refused to speak to him. She is not his fucking auntie!!! She's a homewrecking little bitch.
I know it wasn't the best reaction but it was a snap decision, no time to think it through and now I don't know what the next step should be. He is unlikely to contact me as he is an arse about these things, refuses to discuss anything and I still feel too angry to contact him. AIBU to not apologise? TBH I was already cross as he gives me the bare minimum maintenance for DS but turned up today with 3 new shit tattoos, and this just felt like the last straw. Arrgh!