Advice / rant needed 🥲

So last July (2023), I started seeing somebody and after a couple of months I decided to leave due to multiple reasons, again in July this year he added me twice on Snapchat asking how I was, how my son was, giving me life updates etc and then deleted me after a couple hours both times. what he failed to tell me was that he has a pregnant girlfriend. Anyway, she has reached out to me as she’s found things of us on his phone from last year (I didn’t know he had even taken any until she told me) and I’ve told her about him adding me this year too. She’s confronted him about all of the things I’ve said and she has sent me ss of his response which was that I was just a ‘shit shag’ a ‘tramp’ and ‘why would I go back to that when I have you at home’. I’m just so annoyed that I’m being attacked simply for answering questions, I had no clue he was with somebody at the time he added me, and if I was her I’d definitely want all of the answers too so I felt it was only right to tell her the truth about the things she was asking but I feel so guilty and shitty about everything idk what to do 🥲