This happened because my stepsister was feeling horny, she had seen a video of me kissing my boyfriend from my cellphone. It happened without my permission, he immediately took my cellphone and watched it. I didn't expect that I forgot to hide the file, but he got excited after seeing the video of me and my boyfriend kissing, so he wanted to do it. And finally my stepsister pressed her lips to mine. I couldn't stand the taste so good, I immediately opened my pants and put my cock in his mouth. He sucked my cock so deliciously.