My Cousin Was Not Attractive But Was Very Outgoing Sexually

She wore glasses that made her eyes look huge, always slightly chubby and as tall as I was, she also had a big butt on her along with big boobs. She was over at our house for dinner often and I would make the best of it offering to play board games downstairs after dinner until her parents were ready to go home.
We went to different schools so we only saw each other when our families got together and a few times when her parents had gone out of town she stayed with us, she was over for just that reason when we had our first sexual interaction. We were playing monopoly, not her favorite game but at least we were doing something. We were on summer break so spending a lot of time together, I had made pretty much a whole row along one side with houses on it and rents were killing her. When she ran out of money she made the comment Guess I can't pay so I will have to suck your dick now. I laughed saying something like No, not necessary, the game is just over and I won. She was staring at me and asked So you don't want it sucked? I was like we are cousins, not sure that would be a good thing to do but she just kept at it. I told her if she really wanted to do it then Okay, she got excited about it right away telling me to stand up, she took off her t-shirt saying she did not want to get anything on it. I was amazed at how much she was into this as she reached out stroking my cock like three times then just started sucking on it. I was staring down at her but honestly could not see much with her long hair everywhere, she always had a thick head of it and was naturally curly. I gave her plenty of compliments telling her how great this felt and so on, she stopped for a second and told me to undo her bra in the back, she slid it off and I was looking either side of her head at them still amazed she was sucking on my cock. I came and she just kept sucking swallowing it down and was still really eagerly sucking on it. I leaned over wanting to touch her breasts badly, she has really big nipples that get erect and I was seeing her in a whole new way for sure.
she got up and undressed the rest of the way, went over and sat on the old couch spread her legs out for me to touch her all I wanted, at fifteen I was now understanding where the phrase pussy licker came from and was about to be one. Some how her chubby body looked like a super model to me now, I was having the time of my life at that point and she tasted really good. She had her legs up holding the back of her knees and knew what she wanted from me, showed me her clit and told me to what to do to it and wanted a few fingers in her. She seemed to have a lot of experience but told me this was her first time also. She sucked on my cock again after having her orgasm then told me she lied about it being her first time but did not want to tell me who she was with before, I was fine with it and we got dressed afterwards and had some lunch. I asked her if she wanted to watch some TV when we finished lunch, she gave me this smile and said I could watch TV and she could suck my cock again, I was liking where this was going but still was just amazed at how fast things went from never touching each other to this.
We get back downstairs and I turned on the TV, she undressed completely again so I did the same sitting back on the couch while she sucked on me. I came and she just kept sucking until I was hard again, she got up and started getting on top of me and I was staring at her asking what she was doing as I felt her pussy on my cock and hands on the back of the couch with her breasts in my face. She said she was on birth control and sank down on it and began bouncing up and down, she was really enjoying herself then said You promise not to tell anyone if I tell you who had sex with me? she then laughed like you do when you are nervous, I told her secret was safe with me and she just said My dad. I had no idea what to say to her next, as if this day was not mind blowing enough for me and she was riding my cock when she said it. Minute passed and she asked how I was doing, asked if I was close to orgasm yet and I told her no, she went for a few more minutes then climbed off saying her legs were tired. She got down on the floor on all fours looking back at me and asked if I would fuck her. She was amazing for sure but her confession just had me wondering like crazy how it started, what did the do and when because both her parents worked but I did not want to pry into her life as I knelt behind her enjoying her pussy again.
We had sex just about anytime she was over, neither one of our parents caring what was going on downstairs and summer breaks were one long sexual extravaganza when I got a car. About a year into college I came home one day and my mom says Yeah, your cousin got pregnant up at school, laughed and said My sister is just infuriated with her. I sat there just listening thinking my cousin must be just depressed. They got married and still are today.