First, the car ride

"I think we should head to my sister's place," she replies, reaching around you to pull Blue's mouth from you, "OK, girls, we're heading home. You can continue this in the car."

You reluctantly stand up, and have to physically hold Blue by the neck to get her to stand up and not impale her throat on your cock once again. Pink is more restrained, and picks up their clothes (well, their bikinis) before leading you over to the sedan their Aunt is unlocking.

"Easy there," you tell Blue, "You can start again in the car."

She barely waits until you fold yourself into the backseat before leaping into your lap, furiously jacking your slick member while wriggling her ass into place astride you. She's facing forwards, reverse cowgirl, and hesitates for a moment, looking over her shoulder at you.

"While hole would you like?"

You reach around her arms to grip her firm and ludicrously inflated tits, before growling in her ear,

"Give me your ass, slut."

She gasps in delight as she impales herself, sinking down inch after inch. Her back door is furiously tight, slicked up but gripping at you with rings of muscle.

You groan and grip her breasts tight enough to make her whimper before you realise and loosen your hold a little.

Her hands are gripping the head rests, helping to lift herself up to sink back down on you, so you almost start in surprise when another set of fingers joins yours on her breasts. It's Pink, squirmed around in the passenger seat, grinning delightedly at the anal stuffing her cousin is experiencing.

"You're so good to us," she says, "giving her that ass-fucking even after Auntie had to help before. Can I rub her pussy while you fuck her?"

"No," you grunt as you bottom out once again, "I want your fingers inside her. I want her to feel completely stuffed."

It's not a long drive, only 15 or 20 minutes, but it's enough time for you to blow a load into Blue's asshole. First, she'd come several times on her cousin's probing fingers and your thrusting cock. You'd tried to sit still and work her tits while she fucked herself silly on your dick, but it was hard not to lift up off the seats and pound back into her.

As you're both panting in the afterglow of orgasm (and Pink is halfway to crawling into the back to make out with her cousin without the awkward angle) the car stops.

"We're here!" says Auntie, popping her seatbelt. Looking out the window, you see a rather generic looking white picket fence suburban house.