[Story from the perspective of a mother, with her adult son on break from college]
(Act 1)
You have just finished looking through the fridge and the cupboard as you make your grocery shopping list. You figure before you head out shopping you should ask your son if there is anything he'd like picked up. You open the door and take a few steps into his room.
Your son is sitting their stroking his very sizable cock. You are caught in awe. It's just massive. As you stand there gaping, he notices.
"I was just . . . going to ask if . . . you wanted . . ." you stammer.
He quickly gets up and closes the door behind you. You two are within arms reach. You take a step back.
"What are you doing?! I'm on the wrong side of the door." you exclaim.
He steps forward into your space and leans forward to whisper in your ear "I saw you staring, mommy. It's just the two of us, alone Why don't you help me out?"
He brushes your hair back gently and kisses your neck. His hard shaft now pressing lightly against you.
"We can't do this." you halfheartedly protest.
You aren't moving away.
"Why not? We both want it." He replies guiding one of your hands to his dick.
Your hand moves on its own as it starts slowly stroking up and down. One of his hands firmly cups your butt, as the other begins to grope your breast. You let out a little moan. While your lips are still parted his jump onto yours.
His tongue presses into your mouth. With your free hand you raise the front of your dress. You angle his shaft forward and slide on top of it. Now stroking it with your vulva through your now soaked panties. Your hands are now resting on his shoulders, with your arms under his. He pulls back from the kiss.
"I knew you wanted me" he says with a cocky smirk.
You can't deny it, but you are too embarrassed to admit it. His hand on your butt pulls you back off his shaft as his other moves to your shoulder. He pushes you down to your knees. And with his other hand slaps his cock on your face.
"Suck it" he commands.
You open your mouth. Just the tip feels like a mouthful. You bob your head on it a couple of times before you try to force more of this monster in your mouth. You aren't even to the base and it's touching your throat. As you move your head back and forth you get a little more each time.
"That's it, mommy. Be my little slut."
His hands grab the back of your head as he pushes all the way in. You are gagging on his massive dick. He pulls back. you cough and sputter. You get a good breath in, then it is back down your throat. Tears are welling in your eyes. Your pushing on his hips with your hands.
He once again lets you breathe. You go back to sucking on it yourself, now getting it from tip to base. Your own juices are dribbling down your legs. One of your hands is rubbing your lips, occasionally tickling the clit.