Pushing things further

"Uh, okay," I say, still kind of stunned by her willingness to just reveal her bra covered chest to everyone "now take off your bra." I tell her.

My jaw just about dropped when she unclasped her bra and tossed it aside next to her shirt, fully revealing her DD-cup sized breasts for the whole room. Melissa then sat there without a care in the world, simply smiling. Jess took a peek at her large mounds as a blush swept across both of their faces

Okay, so they really would do anything I asked of them. "Wow sis, you have really great tits." Heather said offhandedly. Right away my mind went into full perv mode. I looked into Heather's rebellious 18 year old eyes. "Melissa, take off your sister's panties and eat her out until I tell you to stop. And crawl over to her." I said with an evil smirk. As she crawled over to her younger sister and pulled her white cotton panties down to her ankles and start to kiss and lick her sister's slit, it was finally dawning on me that for this own night, I had total control over these four girls.

I couldn't help but to unzip my pants and start to jack myself off watching the two sisters engage in their little incestuous show until I realized, why jack off, when I have two willing and available mouths to fuck?