When you walked in on Montse lying in her bed in her little yellow dress, she's a little shocked to see you there, and trying to stop you from looking up her skirt or staring at her cleavage. While reminding you she's your step-aunt, she notices your hand wandering down to your pants and rubbing your cock from outside. Trying to hide herself with a pillow, she's trying to resist your charm, but can't take her eyes of your big beautiful cock, finally relenting and agreeing to stroke it for you for "just one minute". With a smile, she keeps stroking, and moaning, then agreeing to flash her tits for "just one second". As time goes on, she can't resist the urge to let go, letting her big natural MILF tits out, rubbing her pussy through her panties, and sucking your dick before peeling off her panties and rubbing her pussy while you stroke. Now that she's very turned on and soaking wet, she lets you mount her from on top, while you fuck her good and hard and she moans for you while her tits bounce and she cums loud and hard