Inside her, of course

Your unprotected cock slides in and out of Sara's wet cunt. "I'm so close...Will you...? Will you....?"

"I'm going to come inside you!" you cry.

"OH GOD YES!" Sara shouts. Sara's pussy spasm with her orgasm, becoming impossibly tight, and her asshole squeezes the finger you have still inside her. "Oh fuck, ohhhhhhhhh YES! You're coming inside of me!"

You explode into Sara's body, your sperm shooting into her with a rocket ****. She moans harder as your cock swells with each shot. The ecstasy overwhelms everything as the two of you come together. Every little blast of your fertility shoots into Sara's pussy.

"Fucking blast it into me!" Sara screams. "Come in my slutty pussy! Yes! Yes! Oooooh! Fill me with your cuuuuuummmm..."

Your body pumps rope after rope of your fertile sperm into Sara's pussy. Your balls contract with each load. Sara quakes along with you, just a moment after you shoot each load into her.

After a moment you pull away from Sara. She rolls languidly over the car to face you, her pants and underwear still at her knees. "God, my cunt is so full right now," Sara says. "I love it."

Sara runs her hand over her clit, shivers with pleasure, then runs a finger through her pussy lips, gathering your combined cum. "We taste good together," Sara says, licking both of your juices from her finger.

You look around. It seems like no one stopped to watch your outdoor fuckfest. Sara is already pulling up her pants. It feels strangely businesslike.

"Well.." you say.

"Don't give me that shit now," Sara says. "You just blasted me full of your cum, while I'm unprotected, and I love it. I should never have stopped fucking you. Guess I'll just have to make up for lost time." Her hand reaches down to her pussy, where some of your sperm has gathered. She collects the sperm with one finger, brings it to her mouth, and licks off your combined juices. "Speaking of which, I have two holes left."