"Mom, can you help me with something?" the stepson asks, his voice cracking. She enters his room, her eyes widening at the sight of his massive erection straining against his jeans. "Oh, sweetie, you need some relief," she purrs, dropping to her knees and freeing his throbbing cock. She sucks him deep, her big tits heaving, before climbing onto his lap and riding him reverse cowgirl. His cum splashes onto her tits, and she smiles, wiping it up and licking it off her fingers.