A year ago, my girlfriend was having an affair with a close friend and neighbor of mine named Craig. I introduced them to each other around this time of September and behind my back would flirt with each other and tease each other until they had sex after 3 weeks of flirting and hanging out. The next day after they fucked, my friend confessed everything to me out of guilt while my girlfriend did her best to hide it in shame. I took advantage of the situation and had her on speaker phone, while my friend was with me, and forced them to give me the details as they cried of humiliation.