Nude modelling session turns into steamy hookup

I've been grinding away at my drawing skills, sketching my stepmom in her tight little outfits, but fuck, I can't focus—her curves keep pulling my eyes away from the paper. She notices my frustration and smirks, "Baby, you need a real nude model to get inspired." Before I can blink, she's stripping down, peeling off her top to let those massive, perky tits bounce free, nipples already hard and begging for my mouth. She shimmies out of her skirt, revealing her shaved pussy glistening with arousal, ass cheeks jiggling as she strikes a pose on the couch, legs spread wide. My pencil's forgotten; my cock's throbbing rock-hard in my pants as she teases, "Draw me like one of your French girls... or just fuck me already." I drop the sketchpad and dive in, burying my face between her thighs, tongue lashing her swollen clit while she moans and grinds against me. She yanks my head up, shoves her dripping cunt onto my shaft, riding me reverse cowgirl so I can watch that juicy ass clap down, milking every inch. We flip, pounding missionary with her legs wrapped around me, tits heaving as I stretch her tight stepmom hole until she screams my name, creaming all over my cock before I pull out and blast hot ropes across her face and tongue. Art class just got a whole lot steamier.