Deflowering My Wife's Sexy Little Sister

Every day that goes by, my wife Lynn's teenage sister grows up a little more. In fact, Kelsey's starting to look a lot like her big sister did when I met her. She has worshiped me since the day she met me, and lately, she's been trying extra hard to get under my skin.

Just days after her eighteenth birthday, she came over to ask my wife how her prom dress looked. I tried to tell her that my wife wasn't home. When the little brat wouldn't leave me alone, I decided to give her the attention she craved. When my discipline wasn't enough, I gave her a sneak peak of what her boyfriend would expect after prom. I had no idea she was saving her innocence, just for me. I may not have deserved what she had saved for me all those teenage years, but I took it, and capped off the sexual experience she'll never forget with an impregnating creampie!

This 7700 word story features a baby sister who tries her best to seduce me, spankings through a satin prom dress, running mascara, the loss of virginity, a hate fuck, and a little sis who squirts so much when she cums that she won't be able to walk straight for a week!

She giggled right in my ear, a soft little giggle that sent another wave of testosterone through my body. "You don't have to worry. I turned eighteen last Saturday. I'm an adult now..."

I laughed, the laugh sounding hollow even in my own ears. "You're definitely not acting like an adult. An adult wouldn't try to seduce their sister's husband. No, I'm afraid you're still a bratty teenager."

Kelsey squeezed my cock. She might not like being talked to this way, but it wasn't going to turn her off. "Oh really," she said. "And why do you think I haven't grown up yet?"

I should have dropped it right there, but I had so little blood left in my brain at this point. "I've seen the way your daddy spoils you. My guess is he's never disciplined you the way you need to be disciplined."

She leaned in and whispered in my ear the last thing needed to push me over the edge. She said it so seductively that there was no way I could have resisted. "So discipline me."

Something inside me snapped. With my hand that was already on hers, I pulled. My other arm got up and out of the way as her tiny body was yanked across me. She squeaked with surprise, but I could tell that this was exactly what she had always wanted. Her tits rested on my leg as her legs swung up onto the couch.

I still had her hand pulled as far to my side as I could, and her ass was right underneath my raised hand. She was face down, bent over my knee, in perfect position. Without waiting for her to react, I brought my hand down hard on her ass. The sound of the spanking was muffled by the soft satin fabric, but by the gasp that Kelsey made, I could tell that the spanking was painful.

"You like teasing your brother-in-law?" I asked. She nodded quickly, and my hand came down swiftly on her satin-clad ass. She moaned, and as I rubbed the spot where I spanked through the soft fabric, I could feel my erection crying out in my pants for release. She began to grind her ass into my hand. The skin on her bare back looked so smooth, I wanted to run my fingers all over it. For now, however, the girl needed a lesson...