My GF and I have been dating for about 3 months, but it took us a while to actually become officially GF/BF. Before knowing we were dating, her friends would constantly make jokes about her exes and tease her about them. Their humor is really intense, and they just try to find ways to tease each other and get under each other's skin. It seems like they are all fine with it. It made me uncomfortable, but we weren't official then, so I didn't really pay too much mind. I would just stay quiet while they made those jokes.
However, even now, after they all know, they still make the same jokes about some ex she had. They were asking her about a promise ring he had given her and asked her what she had done with it, and they kept stretching out the joke. I don't really like them going into details of romantic gestures her ex did for her, but I also don't want to seem like I am an insecure or jealous buzzkill who is not letting them make jokes.
Is it worth it to confront them about this or just deal with it?