My stepmom's masturbation marathon is in full swing when I stumble upon her. She's sprawled on the bed, legs spread wide, a dildo buried deep in her pussy. Her clit is engorged, her hips moving in rhythm as she fucks herself. I can't help but join in, pushing her legs further apart, taking in her slick, pink folds. I tease her, running my fingers along her inner thighs, then plunging them into her wet heat. She gasps, her body tensing as I finger-fuck her, her orgasm building until it crashes over her, her pussy contractions milking my fingers for every last drop of pleasure.