Ladies, if you overheard your boyfriend planning to sleep with another woman?

If you heard your boyfriend talking on the phone saying that he was going to "hit it one of these days" to another woman on the phone, and "hopefully it would be soon", yet he and you are getting along well, and aren't talking aout breaking up, what would you do?( He also keeps in touch with this woman ,calling her once every couple of weeks)I'd dump him, but I want to know any other thoughts. Would it mean that a woman was weak of afraid to dumo hinm if she stayed, also having intuitive feelings about him wanting to be with other women?