Of course you will

"Promise me one thing..." Sara says. "Fuck me on my wedding day?"

"Of course I will," you say.

Sara's naked form, sweaty and sticky, positively glows. Her eyes bore into you. "Promise me that your cum will be running out of me when I tell James 'I do.' Promise me that I'll get married with your cum in my pussy. With our cum giving me a baby. Giving me your baby."

"I promise," you say.

Her finger once again looped around her clit. "I'm sore but my little clitty is already so stiff again," Sara says. "Stroke your cock for me too?"

Your hand reaches down to find your cock. It is slowly beginning to grow again. Your hand pumps slowly.

"Tell me again?" Sara whispers.

"I promise," you say.

"Tell me," Sara says.

"I promise that when you walk down the aisle, you'll be smiling because my load will be as deep inside you as it can go. You'll be smiling with the memories of my cock stretching your cunt, my cock pulsing inside of you, me pulling up your white dress before the ceremony and slamming into you hard and fast until we both come together. You feel a bit of my load slosh in your womb with every step..."

"Oh God," Sara moans.

"...and you'll be smiling with the hope that my cum, my potent cum, will be making a little baby inside of you."

Her body began to have little convulsions. "I'm trying to hold off," Sara says. "When you're about to come, I want you to push the head into my pussy and shoot that load into me. Don't worry about how I look. I'm going to bring every drop of your cum back home inside of my pussy, then seal her up tight. Give...me...your...cum....pleeeaase?"

"I'll give you my cum," you say. Your cock grows harder. You are sore but you can feel the first signs of the final orgasm of the evening.

"Will you promise me too?"

"Any...thing," Sara moans.

"Promise me that I get first dibs on this pussy for every baby you're going to have?"

"You want to keep knocking me up?" Sara exclaims. "Forever and ever? OH MY GOD. FUCKING FUCK ME ALREADY."

"Promise me," you say. Your cock is fully hard again as you jerk it. Sara looks at you with unbridled lust.

"I promise that I'll always let you try to impregnate my slutty little body. I'll only be a slut for you. For your cum. You can use me. You can come anywhere you like, in me, on, wherever you like. Fuck me in front of a girlfriend. Fuck me with your wife. Fuck me on your wedding day. Oh, do you like that idea?"

You nod. Your cock is fully hard.

"When you kiss your wife for the first time," Sara says, "your cock will still be wet with my juices and your cum will be contained inside me. Inside my slutty holes. Your wife will slide that ring on a finger that smells like my cunt. And if she wants, I will join the two of you on your wedding night as you pump her unprotected pussy full of your swimmers. Just like you pumped mine. You'll fuck her, and fuck me, and fuck her again. And you'll shoot that load deep into her, because you already gave me one. When you come inside of her, after, I will eat your cum from her soaking pussy like the cum-hungry slut I am. I will—"

Both of you begin to come. Sara recognizes the signs and pushes the head of your cock into her pussy. Her pussy immediately clamps down on you. "FUCKING FUCK ME AND CUM INSIDE OF ME. Fill me. Fill me. Fill me with your cum. Fihhhadlkj—"

Sara loses her ability to speak in her orgasm, and begins making a series of sexy swears and gasps, and then your cum rises and pushes you over the edge. You push all the way into Sara pussy, like she asked but almost on reflex. One long, hard spurt of come pushes from your balls and arrows into Sara's womb.

"Mmmpphhmmmmphhh" you grown into her. Sara positively glows. As she feels you come, Sara's whole body shakes, the muscles of her arms and legs vibrating, her pussy shaking and massaging all the cum out of you. Your heart pounds with hers. She breathes in gasps of air again, her chest heaving, her pussy spasming with little aftershocks of orgasms around your delicately sensitive cock.

You lay connected for a while, stroking each other's bodies. She toys with the hair by your ear. You suck on her earlobe, tasting the metal of the stud in it. She runs a finger around your belly button, playfully exploring.

"I meant all that," Sara says.

"I did too," you say. She smiles and cuddles her head into you.