"Marty, do you remember about 3 months ago when you went camping with Todd and his dad and uncle.?" I nodded... "Well, that Saturday Patty and I came over to use the pool.
I used my key and let us in the side gate because I did not know if anyone was home and I did not want to disturb your mom."
My mom was sucking on Trina's petite boobs as if there was nourishment about to come forth. Trina held her head there, cradling it as if mom were her baby. Mom's arms were tied behind her at the elbows and pulled tight, with her wrists tied together, pulling her shoulders and arching her back so that her very large and full tits were thrust up and out. Even though their bodies still glistened with the sheen of sweat and a healthy does of cum, my cock was stiffening up watching them interact. I has no idea that mom was a lesbian, or a submissive or that she had secretly been wanting to have a sexual relationship with me, her only child. I always thought she was a hottie and many a cum soaked sheet was due to fantasies involving her, but that was all they were. Now though she was given to me by my girl friend, her lesbian mistress, as a birthday gift. Even through the confusion and surprise, my cock liked what was happening.
"So Patty and I strip down to our suits and jump in and it isn't long before she is wanting to play more than Marco Polo. She pulled off her suit and was trying to talk me out of mine, kissing and touching... you know how she is sometimes... Oh! Look at you mister 'tell me more sex stories about my girlfriend, her friend and my mother'."
Trina pulled mom off of her nipples and with a handful of her beautiful red hair turned her face to see my swollen cock.
"Just look what a perv your son is slut... guess I am glad that the apple doesn't fall far from the tree."
Trina pushed mom off of her lap and crawled up to sit on mine, nestling herself on my cock pretty as you please.
"Now you just lay your "Birthday Boy" ass right there and let me use this fine cock of yours for our mutual pleasure. Mavis you lazy cow, you use your tongue on my ass hole while I ride your son and if you add to my enjoyment then I might let you clean his cock off after he cums."
"Yes Mistress. Right away Mistress. Thank you Mistress."
Mom struggled to position herself to get her mouth and tongue into action and Trina began rocking and sliding around on my cock. A few short moments later she resumed her story.
"Patty had gotten my top off and was nuzzling my neck while trying to work me out of me bottoms, (she can be pretty pushy like that and I was only half heartedly resisting) when she whispered, 'Is that Marty's mom watching us from the upstairs window?' I did not know who else it could be and I could not think of too many reasons why she would be peeping at us, so I tweaked Patty's nipple to get her attention and told her to follow my lead and put on a good show. I wanted to see if my hunch was right. I had noticed your mom looking at me a little different lately.
So I turned and pulled myself up out of the pool, but stopped at the waist, as if Patty had caught me, and she caught on real quick, like I had written it out like a script."
"Yeah... a real tough call there sweetheart. Shove your ass in your horney lesbian best friends face and, who would guess what she would possibly do."
