On one hand, men don’t like being cucked. On the other hand, a lot of women will talk about other men to see if you get jealous. If you get even a little bit jealous, you seem like a wuss, and the woman could lose attraction for you! In fact, they could even dump you!
Doesn’t seem fair, does it? Seems like a trap. But men go on and on about being cucked, how cucked men are despicable, and how they aren’t the type and won’t be pushed into that situation.
The advice from me, but maybe not @Robert Lindsay, is just to ignore “jealous provoking” with silence or humor. That is, if you really want the girl. If you don’t, you could move on. I think in a lot of these situations that the woman is trying to provoke you with a guy she has no actual interest in. It’s just a test from the woman.