A friend of my daughter, who is a female student, came to stay over and secretly watched my adult video with my daughter! The friend, aroused from watching the AV, couldn't hold back and started masturbating!! Seeing this, I instantly got an erection! Though confused by the erection, curiosity won out, progressing from just 'touching' to just 'rubbing,' leading to an unexpected state of dry humping! Then, too excited, my slippery pussy was easily penetrated… It felt so good that I kept thrusting my hips and climaxed repeatedly! She even demanded that I cum inside her!
