Post gym hot tub with my step-son

I’ve taken my beautiful teenage step-son to the gym to help him relax and get over his break-up with his slutty girlfriend. while at the gym and after working out, we got in the hot tub. me in my bikini and him in shorts. there were other people in the hot tub but no one noticed me stimulating his cock under the water. we’re now leaving to go home and he’s still hard. both of us are so turned on. i decide i’ll wank him in the car-park; hope no one notices. i can’t resist; i need to suck on that hard young cock. he doesn’t need that slutty girlfriend, he’s got me!!