Cousin Helen

My cousin Helen has always been a shy overweight girl. I'm Ross and I work in the city and when Helen had to come to the city for work, it fell to me to look after her. It was okay I've always like Helen and we got on well. Helen was still overweight, but had a figure and a large rack. Her main problem was the lack of any self confidence, she was good at doing her work. But when it came personal interactions, she retreated in to her shell so to speak. She wore thick glasses and didn't drink or smoke and was so shy. She would hardly ever speak in front strangers. Quiet was what our grandmother called it, also she is a neat freak. Which works well for me as she keeps my apartment spotless. Last Halloween I and some friends went partying and I dragged Helen along also. We were all in costume, Helen was still quiet and kept very close to me. It was very late when Helen and me got home. I was still in the party mood and started muck about and grabbed Helen for dance. I pull her close and we had fun, then I spun her out and my costume had caught onto hers and part of hers torn away. Revealing her breasts and I was delighted and she was shocked. She tried to hide them, but ask her not to and pull her close again and kissed her. She said We can't we're related and I said I don't care and went back to kissing her. She started to kiss me back and so I took her to her bedroom and laid her on the bed. I quickly undressed and then started to undress her, she said We mustn't and I would just kiss her again. After she was undressed I worked my way down to her vagina and soon had her moaning. Then I mounted her and fucked as had as I could, just pulling out before I blew my load. We slept together that night and I've been visiting her most nights since. She is still shy around other people, but she now asks me for sex when she wants it.