am I overreacting?

Okay so this morning I woke up as usual, but my fiancés phone was going off. So I just went over to check it, and saw that he had gotten a text, from a woman at 9am. Immediately I asked him who she was and why she was texting so early. He said she's an old friends ex baby mama. He said I've met her, but I don't remember her. I guess he's been talking to her on this forum because my fiancé and I have been trying to get into threesomes and all that. So he's just been asking her advice and shit. Should I be worried? I'm definitely going to have a talk with him tonight when he gets home from work. It just really messed up my feelings and I'm not sure how to feel. Would y'all be worried? 😭😭