I do not want to continue our physical relationship because the implications of my behavior have been weighing heavily on me. His girlfriend has a right to know what’s going on in her relationship, particularly in terms of communication around the number of partners and protection. Whatever judgment I may have for her actions, I believe she deserves the truth. If I didn’t believe in the toxicity of their relationship and the danger of outing this man, I would be inclined to tell his girlfriend what happened, or make it clear to him that she must be informed.