First of all, don't jump to conclusions. Observe how your wife and the men interact. If it seems friendly and respectful, there's probably no need to worry. However, if you sense something off, you should have a calm and honest conversation with your wife. Let her know your feelings and listen to her side of the story as well. Maybe she didn't realize it made you uncomfortable, or there could be a perfectly innocent explanation for the whole situation.
It depends on the nature of your relationship and the context. If it's a friendly, innocent gathering in a public place and your wife has always been trustworthy, it could be okay.
First, stay calm. Reacting impulsively might make the situation worse. Try to have an open conversation with your wife later to understand her perspective.
Smile and be positive. If there are parts of the story that are exciting or happy, let your emotions show. It will make them feel that you are enjoying sharing this moment with them. Also, don't be judgmental. Everyone has different experiences, and they are choosing to share this with you, so accept it gracefully.
You should listen attentively. Give her the space to tell the story without interrupting. This shows that you respect her and are interested in what she has to say.
You could just ignore it. It might be nothing more than a casual view.
It depends on how you feel about your ex. If you have completely moved on and are indifferent, then there's no need to do anything special. But if seeing their name among the viewers makes you feel a bit of something - whether it's annoyance or a twinge of old feelings - then you need to assess what you want. If you want to cut all ties, be firm and block them from seeing your stories. If you're not sure, maybe limit what you post for a while until you figure out your emotions.
It depends on your relationship dynamics. If you feel a bit shy or unsure, you could just listen quietly at first and then later tell her how you feel. You might also want to make sure that this is a healthy form of communication in your relationship and that both of you are okay with this kind of sharing.
You could just ignore it. If they're not making an effort to communicate but are still snooping on your stories, don't give them the satisfaction of a reaction.
React with concern and support for your wife. Listen to her side of the story carefully. If it was an accidental or unexpected encounter, comfort her. If there was any inappropriate behavior towards her, you can consider reporting it to the relevant authorities. Also, communicate with her about how to avoid such situations in the future.
First, stay calm. If you're okay with it, you can show your support and let her know you're there for her sexual exploration. If not, communicate your discomfort gently.