Aria Carson finds her stepson Charlie Dean in his bedroom studying for his biology exam. Charlie failed his last exam and his dad and stepmom are concerned. Aria offers to help Charlie. When he fails the practice test because he's too into looking at Aria's boobs, Aria gets an idea of how to help him. They're going to play a game where for every question Charlie gets correct he'll get to see a bit more of his hot stepmommy.
Once Aria starts down this road, things escalate quickly. Charlie is suddenly an expert at biology since it means seeing more of his stepmom's body. Eventually they abandon the pretense so Aria can just stroke the cock and then lean into begin sucking it. Her husband is away, after all, and this young and horny kitty wants to play.
Aria eventually climbs aboard to ride Charlie's hardon in reverse cowgirl as he squeezes that ass. When she gets on her knees, Charlie keeps up the pussy pounding from behind. Rolling onto her back, Aria takes it hard and fast as Charlie holds nothing back. She finishes of in cowgirl, riding the fuck stick until Charlie gives her a big creampie to lick from her fingertips. Raising a finger to her mouth, Aria cautions Charlie against telling his dad.