I couldn't believe she called me a cocksucker. Yet, it turned me on, my cock again flinching in its confined space. I again lifted my ass up to reposition my dick. I watched my wife take another person's cock in her mouth. I also couldn't believe she was expecting me to suck her sister's cock... I also couldn't believe how much I wanted to.

"That's it, baby sis, suck cock like you do almost every day," Kara moaned, revealing yet another shocking secret in this surreal experience. I knew they were close, seeing each other almost every day and talking on the phone every day, but I had no idea...