You go with the flow

"No, I was just in a weird position. You are doing great," you answer Mary back and then you push her mouth back down on her cock. You can't take your eyes off of Mrs. Shelly as she has opened her robe and she is naked beneath it. Her tits are bigger then Mary's and have a nice mature droop to them. She is working her fingers in her wet cunt and pulling her dark, erect nipples as she smiles at you and blows you a little kiss. You wonder if Mary knows she is there, or if her mom is just into peeping. You decide to just go with it, and enjoy the show and the blow job both.

Mary quickly has your balls at the boiling point and she must be able to tell that you are about to cum because she stops sucking you for a moment and looks up at you and says, "Don't be too noisy when you cum. I don’t want my mom to hear." Then she lowers her mouth back to your cock and begins to work your cock again.

You look over to where her mother is watching and masturbating and you think there is no way your mom is not going to know when I cum. You also realize that Mary has no idea that her mother is watching the whole thing. This is somehow totally erotic, not weird like it should be. You are rubbing and stroking Mary's big tits and you can hear her grunting with excitement as you rub her fat nipples. You focus your eyes on Mrs. Shelly's big tits as Mary brings you to eruption and you moan "I'm cumming" as you spurt your first shot into Mary's mouth. Mary takes your cock deep into her mouth and swallows your load like a pro. She keeps her tongue working on the bottom of your cock head and you moan loudly in pleasure.

Mary comes off of your cock and keeps stroking you lightly with her hand as your head swims in pleasure. You look over to where Mrs. Shelly is standing but see that she is gone. You begin to wonder if you imagined the whole thing, some kind of sexual fantasy in your head.

Then Mary breaks your concentration and says, "Touch me with your hand, make me climax." She turns around and scoots up against your chest. You slip your hand down the front of her unsnapped pants and slide them inside her wet panties. Her cunt is soaking wet and your fingers slid easily up and down her cunt lips. Mary moans in pleasure as you find her hard clit, and you begin to rapidly rub your fingers across her sensitive clit. You look down over her shoulder as Mary pulls up her t-shirt over her breasts releasing her big firm tits. She starts to use both hands to rub and stroke her dark nipples as she writhes in enjoyment as you rub her clit. You bring your other hand up to feel her bare tit and you pinch her nipple between your fingers feeling it swell as you stimulate it. She is so wet that your fingers slip frictionless over her clit, and slid up and down her cunt. You slip a couple of fingers into her pussy a little way and pump a couple of times. She moans in pleasure as you do this and you switch back to her rubbing her clit.

"God, that’s it, just like that, I'm going to cum," Mary exclaims as you continue to stroke her clit. You can feel her convulse in orgasm, and she struggles to keep from screaming out in pleasure. Her pussy becomes wetter as her cunt floods with lubrication as she climaxes. You keep the pressure up on her clit rubbing it in tight little circles as she grunts and moans through her climax. As she comes back to earth you pull your hand out of her pants and she lies back against you her eyes closed in satisfied pleasure.