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Loretta wedges a knee between Miles' thighs, rubbing it against his crotch, feeling his cock jump, springing to life at the smallest touch, but Miles tries to back away, pushing her off.
"I'm doing you a favor, Miles," Loretta says, palming Miles through the front of his pants as he squirms away from her grip, his thighs clenching around her hand as she gropes his boycock through the fabric, "so you can show your big sister a little more appreciation."
Miles lets out a whimper, his voice breaking as Loretta pulls his pants down to mid-thigh and slips her fingers into his underwear, running the pad of her thumb along the underside of his cock, giving it a few quick pumps so it hardens to full-mast against her hot palm.
"How cute," Loretta coos. Even the smallest touch gets Miles hard, his too tight briefs already soaked through the front with warm sticky pre. "You're so sensitive, little brother."
Miles squeezes his eyes tight shut as Loretta makes a grab for his dick, stroking it, her long deft fingers wrapping around the base of his cock and cupping his nuts until he is coming for her, coating her palm in pathetic spurts of white, his legs giving, his body yielding to her.