I never did but when I met my future wife she was single (22), but blowing her much older boss (51) a couple times a week and fucking him at lunch on Fridays. We didn't get super serious for 3 months. I only knew about the situation until the last couple weeks. I was jealous then aroused that she was having sex with him and then on Friday/Saturday/Sunday nights I was doing her 3 times a night.