Prompt: All Grown Up
Xander closed his eyes and commanded all the blood in his body to stop rushing south.
He sighed when it didn't work. He was 26 years old, and he still couldn't control Little Xander. If Anya was here she'd tease him about that.
Of course Anya wasn't here. She'd been dead for nearly four years and he'd been alone all of that time and now he had a gorgeous woman in front of him parading around in lingerie.
A woman who was like a little sister to him, that was Buffy's little sister.
And she was all grown up.
"Dawn, you...you really need to put some clothes on?" When she didn't move he let out a pathetic, "Please."
Dawn smiled and ignored his whimper as she slid onto his lap, "Come on, Xander, you were my first crush. Its only right that you help me get rid of this pesky virginity."
"Dawn you should really wait to do that with someone you care about, someone who..."
"Did you lose yours to Faith when she was an evil murderer?"
Xander sighed, "Exactly why I'm telling you to wait for the right moment...and oh god plesae put your bra back on Dawnie."
Dawn smiled, "I'm kind of hoping you'll call me that when we're having sex. I really like it."
Xander shook his head, "You're just...a very sneaky little minx."
"Of course...I'm a Summer's."