How do you react if you're called out d uring a couple's argument?

There's me, my friend, and her EX involved. My friend was talking to her Ex about how good her current boyfriend is to her. I guess her Ex got jealous because he blurted out ';That is why AMY used to come to hang with me';.





I'm ';Amy'; and I only hung out with the guy once. Not multiple times like he presented it