I’m committed to my male partner and he’s committed to me. (I’m a woman.) But we both understand we need to flirt and that we will both want to sleep with someone else at some point. We live together, we have a dog, and neither of us believes in marriage. We plan to purchase a house in the coming months. Here’s the issue: he met a woman at work. He’s not sexually attracted to her at all. She, however, would love to blow him. She’s in an unhappy marriage and has no friends. They exchanged numbers when my partner was transferred and now she texts him constantly. It doesn’t totally bother me. But not only does she text him at all hours of the day and night, but she continuously tells him he’s the hottest man she’s ever met. She sends him nudes, which...