Joyce and Judy are my stepsisters and moved in with me and my dad six years ago when he married their mom. Both of them are real fat even their mom is fat. Joyce is 17 and Judy is 15.
Me and Joyce always used to fight and argue lots of times and she would always try to see me naked for the longest time. She embarrassed me lots of times but last year was the worst because she caught me masturbating when I was naked in my bed. She did tell Judy but didn't tell my dad or stepmom about it. She kept telling me she was gonna tell them but said she wouldn't if I let her and Judy watch me do it.
We were alone everyday in the summer and Joyce was supposed to be in charge then and after school everyday. She kept threatening me about telling on me and I finally told her I would do it. At first I just pulled down my pants but she made me get naked and lay on my bed to do it. I put hand lotion on my cock and started to jerk off but really had a hard time to cum. It was real embarrassing with the two of them looking at me but I finally did cum. Almost every week after that they both made me do it.
During this past summer I masturbated once and sometimes twice a week when they wanted me to. I wasn't embarrassed anymore and even started to like them to watch. I let Judy's girlfriend watch me six times. In July Joyce started to touch my penis and balls sometimes and awhile later Judy did it to. Then the two of them started to masturbate me and now they do it to me almost every week once or twice. They won't do it when Judy's girfriend watches but now most of the time they either do it for me or touch my balls when I do it myself.
I think both of them get aroused when they watch me but won't admit it. I really like it when they jerk me off and Joyce does it real good but so does Judy but not as good as Joyce. Joyce lets me touch her breasts sometimes but Judy won't let me. As much as I was embarrassed before, now I like it a lot. Now they can't tell on me because of what they do too.