My SO and I have a weird inside joke. First off we love and trust each other very much. So occasionally we’ll joke about a fictional secret lover. An Example: he works a job the very often has mandatory overtime. He’ll call to chat and I’ll ask when he’s coming home, he’ll say why you need to know when your other boyfriend has to leave? Or he’ll bring up a conversation we didn’t have, I’ll say you must be thinking about your other girlfriend. A work friend over heard us once and got offended by our joke. I guess her BF cheated on her, and she took him back. I felt bad for making here feel crappy but i wasn’t trying to hurt her feelings. Does anybody else joke around like this or are we just weird?