Talk shit about him too?

Pretend his existence doesn’t threaten you and take his side?

Don’t acknowledge anything to do with him?

I’m never sure what to do in this situation. Now if it’s a chick you’re with and she’s talking about other guys, obviously the play is to not give a shit and act like you’re not threatened. In this situation I’m thinking it might be different. And I might choose to make fun of him. Thoughts?

Edit: here’s a little more context. I understand there’s a difference between a girl mentioning how her boyfriend makes her feel (womenese for I’m not interested and you’re my emotional tampon) versus talking about an action her boyfriend takes or simply mentioning his existence (womenese for I’m desirable because someone wants me, but I’ll give you a chance to prove you’re the better option).

In this particular case the girl is a friend of a friend, tried to take her out once but she was traveling out of state for the week. I ignored that response and never got back to her about rescheduling. Anyway she friends me on Facebook months later and mentions she can’t follow me on Instagram because her “boyfriend keeps up with who she follows lol 😅”

Is she giving me a small opportunity to display my value? Quick check to see how sturdy the other branches are? If so, do I talk shit about boyfriend or take his side even sarcastically?