You eventually fuck her.

"I will. When IM ready. " you say with a evil glint in your eye. You slide the foot long strap on all across her pussy lips, turning it on to level three to tease her more. The vibrations drive Kiera absolutely crazy, and if the noises are any indication, she wants you in her bad!

"Come on Hayley! Please, please fuck me. I'm so damn horny." she begs, not being handled to much intense teaseing apparently. That could be good to know.

"I don't know. What do you two think? Should I fuck the pillow princess already? I think she has came the most the past few days. " you say in a playfully mean tone.

"Go ahead. She can work it off when your done with her. " Jordan teases, with Emily nodding along in agreement.

"Oh alright then. " you say, pretending defeat. Taking the tip and lining it up to her pussy you slowly push the fat plastic inside of her. Your sister moaning loudly in lust as you do so, and after a good second or two your sister is bouncing happily between you and the couch. Your hands guiding her back and forth along the vibrator.

Not long after though, you are struck with a very arousing thought. Her ass looks so nice and spankable, and you wonder how she would like it. It was always something you've wanted to try with a guy, but was never sure what to say, so why not try it now? You slowly move your hand back and bring it down onto your older sister's behind, causing a loud yelp and a head turn from your sister.