I'm 22 and my step-sister is 18! Our step-brother, who's 20 had a birthday and we wanted to do something special for him. The two of us got him into the den and let him watch us make out. He has always tried to talk us into kissing but we never would, at least in front of him! Actually, she and I have been having sex together since we were both in elementary school and she and I both ate our first pussy with each other in 7th grade!! Anyway, today, he was watching us kiss and fondle each other and we could see he was playing with his cock under his jeans. We told him that we had another surpri... Show more