I had been dating Colleen for a couple of years, and we had just started college at different schools. Before we started dating, she had a relationship with a black guy named Devon, who had a reputation for having a massive cock. Colleen would occasionally joke about the size of his dick, but I never thought much of it.

As we navigated our long-distance relationship, we would see each other most weekends. One weekend, Colleen came to visit and stumbled upon some porn on my computer. One of the videos was titled "Bang my wife," which caught her attention. She didn't say anything at the time, but later that weekend, she asked if I wanted to see her get banged. This sparked a conversation that would lead to us planning a threesome with my roommate, Eric, who Colleen found attractive.

The next weekend, Colleen came to visit again, and we attended a party together. She flirted with Eric, and by the end of the night, he had agreed to the threesome. As we walked back to my dorm, I could see Eric's arm around Colleen, his hand resting on her ass. We entered my room, and Colleen straddled Eric on the futon, kissing him passionately. However, when others started arriving from the party, Colleen got shy and stopped.

The following night, Colleen snuck out of our room to talk to Eric about the threesome. I fell asleep, unaware of what was happening. When I woke up, Colleen was sleeping on the futon alone. The next morning, she left for school without discussing the previous night's events. Later, she texted me, revealing that she had given Eric a "preview" – a blowjob in the basement of the dorm. Eric had told her that it was the best head he had ever received, but he didn't want to proceed with the threesome.

I talked to Eric about what had happened, and he asked if I was mad. I told him that he could do it again if he wanted, but he declined, citing that he didn't want to fuck Colleen and mess up our friendship. 

A week later, Colleen returned to my place, and I discovered that she had been secretly meeting Eric while I was unaware. They had exchanged explicit texts, including messages like "Your cock is just so big, I need to feel it inside of me" and "I came so many times for you, I'm lucky if Matt can make me cum once." I was obsessed with their secret affair, and it continued until we graduated.