A few minutes later

Sarah sighed, she was now lying on her bed, a pillow under her. You were curled up by her feet, licking and sucking on her softened cock, cleaning it and attempting to get just a little bit more of her cum. You were rewarded as a small bit of cum spat out of her slit. You savored the taste before swallowing and getting back to work.

“I feel like I could do this everyday” Sarah said dreamily, you hummed in response, your own work not finished. After a couple more minutes her cock was clean (As clean as a saliva covered cock could be anyway) and you pulled yourself up to lie next to her, Sarah turned towards you, her limp cock still long enough to reach down and touch your own as you faced each other. Sarah looked down at your stomach, slightly bulging from all the cum still inside you. “I wish you could bear my child” she muttered. Realizing what she said her eyes widened and she once again covered her face, blushing furiously. She was just your little sister, and you had Ashley, “That’s the only reason we did this” she thought sadly, “So he could go on to fuck his girlfriend”.

You smiled, gently grabbing her hands and pulling them back, before giving her a chaste kiss. “You know that’s not possible”, you laughed as she gave you a look that that said “of course I know that”. “But” you continued “That doesn’t mean we can’t have a child together when we’re older.”

Sarah gaped at you for a moment, her mind processing what you were offering her. “B-but, what about Ashley?” she asked, before mentally berating herself for reminding you of the other girl’s existence.

“Days ago I thought I would have chosen her” you mused “Heck, hours ago I had her dick in my ass and was desperately thinking about how I could make this work… But I realized something, despite our friendship, despite everything, at the end of the day I was going to be just another conquest. Maybe she’ll calm down and we can still be friends if she knows I’m taken, but I don’t want to be in a relationship where my opinion and desires aren’t taken into account.”

As you speak Sarah’s eyes brighten, at first she can’t believe what she is hearing, but finally she accepts that it’s true! You want her over any other girl. She squeals as she pulls you in for a hug, smashing her lips against yours as you kiss, no longer the chaste kiss from a little sister helping her brother, but one from a woman to her lover.

The End