I would say if you've talked to him about your concerns they same way you've expressed them to us, then you're stuck with leaving the decision up to him. I would definitely mention the creeped out bit. This is one time where you need to rein in your therapist side (and boy do I understand that!) and, instead of focusing on the harm it might do to her, focus on how it makes you feel. Once he knows how the situation bothers you, then it's up to him to choose his course of action.
Pan Female, Hinge in a V between my mono (straight) husband, Monochrome and my poly (pan) partner, ThatGuyInBlack