My first time being a bull for a couple was with a friend of mine. We knew eachother from common friends and we had become friends. I would see her often when going out, I had never met her bf but I knew she had one. At one point she started flirting with me and each time it became more obvious. I didn't really know how to react to that, but since I had never met him I figured they had broken up or something. One time at the club she started grinding on me and I got very horny, she whispered that I should come over to her place and gives me the biggest fuck me eyes I have ever seen. We discreetly walk away from the rest of the group and we get a uber to her place. In the uber we started making out and she put her hand down my pants, when we finally got to her place she led me straight to the bedroom, we got undressed while making out and she whispered that she's been fantasising about my dick for months now, she got on her knees and starts blowing me, she knew what she was doing because my knees were getting weak, she kept eye contact and kept telling me how big my dick is. After a while I pick her up throw her on the bed and start eating her out, she came and after that she pulls me by my hair and says she wants my big cock inside of her, I started off slowly only putting about half of it in her just to tease her a bit, I keep going faster and faster and deeper, meanwhile she's moaning her lungs out. She then said her bf can't do this with his tiny white clit and this took me by surprise, up until this point I was under the impression she was single, the rush I got from what she said though was so big and it felt so good in the moment that I kept going, at that point I felt I had to prove a point so I started ******* her and slapping her and telling her she's my personal fucktoy, my slut. She was moaning and saying yes daddy I will do whatever you want. We did 4 rounds that's night and were basically fucking till the morning. It was the best sex I had had up until that point. When we finished she said we should film it for her bf next time and I agreed. This happened 4 months ago and we still hook up from time to time.