If there were rules that were only established between you and your partner and no one else then my suggestion would be to simply RP this sort of thing out in party. When you roleplay in Say, other roleplayers get a sense that this is an open world and that their player can potentially join in.Â
But if you are open about other players joining in, I would probably shoot a whisper the moment the roleplayer has their character lay approach and lay down the story's rules. Explain that it is semi-open, but open only under these conditions.
I definitely don't think the other RPer's actions were unreasonable but since it went in a direction you didn't want don't feel bad about speaking up and being earnest about your feelings. The other player might get the wrong impression and think that by allowing this stuff to happen that you are OK with it.
It can be easy to get confused or leave with hurt feelings if we don't know the other RPer(s)' intentions sometimes. And if the other RPer isn't communicating about something that you find awkward or that you're uncomfortable with be the first to bring it up. You'll probably be glad you did!
But if you are open about other players joining in, I would probably shoot a whisper the moment the roleplayer has their character lay approach and lay down the story's rules. Explain that it is semi-open, but open only under these conditions.
I definitely don't think the other RPer's actions were unreasonable but since it went in a direction you didn't want don't feel bad about speaking up and being earnest about your feelings. The other player might get the wrong impression and think that by allowing this stuff to happen that you are OK with it.
It can be easy to get confused or leave with hurt feelings if we don't know the other RPer(s)' intentions sometimes. And if the other RPer isn't communicating about something that you find awkward or that you're uncomfortable with be the first to bring it up. You'll probably be glad you did!