My then gf (20) told me this after we got into a fight. How do i respond?

I don’t know where else to post this because 90% of reddit doesn’t allow pictures. J’siah is my son, i went to his birth and i’ve been there for him the whole time, she always throws him into arguments, saying he doesn’t like me etc. (He’s 4 months old)

Backstory we got into a fight, i agree i’m 100% in the wrong a shouldn’t have known better. My then gf did her makeup and i mentioned the way she did her eyebrows look insulated so i mentioned it to her that i’ve only seen one other person do that, i caught myself and she eventually got me to tell her who it was which was a girl i used to date when i was 14, im 20 now. So i got this text message after I hung up, because u was getting named called and threatened.