Son:- age 14-16, kind of a douche, schoolyard bully type of character.. He's brash, crude, he's a snob, lazy and good for nothing around the house; plays video games, hang out at the mall, wears fortnite caps and addicted to monster.. typical suburban teenager trope
Mom:- mid to late 40s, bored conservative, pta-type suburban housewife, the usual... She's past her prime, she's not beautiful or a bombshell but she's fine.. She's put on a bit of a tummy and wider hips now, some wrinkles, that's ok. The usual non-existant sex life with her husband; she wants to spice things up and She secretly gets off on not being respected and appreciated by her douche son..
They, somehow, engaged in incest sex.. not because they are attracted to each other or they are in love... This is purely because the taboo-ness of mom-son incest gets them hot.. pure lust and adultery.. Son treats his mom as a conquest, he's fucking the authority figure in his life, bringing the high and mighty mom to stoop to his level, mom gets off on being the conquest, accepts and plays her role.. Just the fact that he doesn't have to respect or fear her anymore is a huge power trip for him (it's not that he's going to get sinister or he has lost all respect and love for her . He still does, she's still mom... But there's many elements of respect and fear lost and he enjoys that certain element of power or freedom).. They jump around dad's back getting each other's rocks off and using it as a means to live out their many sex-related rps, dreams and fantasies.. maybe it's as simple as:- mom likes the wine, dine and seduce package and son obliges and plays it out for her.. son wants mom to dress up like a trashy teenage tart and strip dance to some hip hop music, it's not that the mom is good at dancing, she'd actually bad.. imagine an average mom in her mid-to-late 40s trying to dance to such music... He just likes to see her do it, he enjoys the juxtaposition and humor, plus it gets him hard... or just throwing a few hoops all in the nude at their backyard half-court, just for the lulz.. sucking his dick while he plays fortnite and gta, or just doing chores around the house naked... say, son brings mom to a house party of his high school friends.. not as a date or anything (everyone knows they are mom son), but to prove to his friends his brags and claims that he "fucks his mom all the time" and no it doesn't end in a gangbang, his high school friends just give him high fives and think he is so cool that he has tamed his mother.. They are not in love, just son and mother... with benefits.
I would love if someone takes this up. HMU if you did.