Family Ties/Wait awhile then go spend the night in Timmy's bed.
Your eyes lock on Timmy's adorable little ass as he exits the room, then you hear him mounting the stairs leaving you with a belly full of your youngest son's cum and more horny than you have even been in your life despite having climaxed. With your tits still exposed and your panties barely put back in place you slip a few fingers inside your pussy and begin fingering yourself. You remember back to when Timmy was just 5 years old. He had been caught in a shed fire and though you managed to pull him out unharmed he was traumatized by the experience and you ended up splitting the duty of sleeping with him for the following three weeks with Heather just so he could sleep.
Even back then the desire to have you little boy wedge between your thighs was over whelming and each night when it was your turn to sleep with him you wore the skimpiest nightie you could get away with almost daring him to try something. Though he never did Timmy did usually fall asleep on top of you with his face planted between your tits in nothing but his little sleep shorts, offering you the chance to slip from you nightie and finger yourself to the feel of his near naked body against your topless one. You had some of the best orgasms of your life during those three weeks and your desire to bed you own son has only got stronger since.
You pound your finger furiously into your cunt while pulling and twisting hard on one of your nipples as a particular night springs to mind. There was some confuse between you and Heather and you both ended up ready to sleep with Timmy one night. Heather was 13 at the time and already sporting a set of C cup tits there were basically on display as she showed up at Timmy's door in a wife beater so big that the straps barely covered her nipples, leaving the mounds of her developing breasts exposed. There was very little you could say to her since your choice of sleeping attire left even less to the imagination; A set of light sleep short and a mid drift cami so old it was basically see through. So when Timmy solved the dilemma by suggesting you could both sleep with him you both nodded and joined him in bed for the night. As the lucky little boy slept both yours and Heather's breasts had been freed and Timmy unknowingly spent the night pressed against his mother's and his big sister's titties.
The orgasm you had been working on for the last several minutes quickly began to mount as images of what might have happened that night if you had acted on your deviant fantasies. Your 5 year old son taking turns fucking his naked mom and sister and the two of you playing with one another. Your climax kicked into full over drive with that fantasy developing into what would happen if you and Heather were to share Timmy's bed right now. A set of E and D cupped tits being hung over his face while he slams his small finger into each of your pussies while the two of you fight over who gets to fuck him next.
You spend nearly 5 minutes enjoying your potent climax before cleaning up and getting ready to head up stairs for the night. It's late and the rest of the house is already asleep and you find your thoughts drifting to your husband, likely sleeping soundly, oblivious to the fact that you have just taken you youngest son's virginity and how desperately you want to fuck him again. This leads you thoughts to Timmy, sleeping in nothing more than a pair of boxers on his twin sized race car bed. You wonder what he's dreaming about. Are you in his dream? Naked with your legs spread, begging him to fuck you. Or are you the one on top, riding his gorgeous cock like the complete slut you are. God, I can't take this! You think to your self as you begin removing your tattered clothing on your way up the stairs, stopping just long enough at you bedroom to quietly toss you cloths on the floor and slipping your robe off the back of the door, confirming that your worthless husband is snoring from his deep slumber.
You toss the robe on over your now naked body and make your way to you young lover's bedroom. Slipping inside and quietly closing and locking the door you turn around to find him sleeping peacefully in his bed. A wave of horniness washes over your body as you approach his bed wondering just how you want to go about waking him up.