The tape was blank to start with and then it came on showing the lounge floor in my grandparents home, I could hear granddad talking from behind the c...mera and I could also hear grandma talking to there neighbor Mark. Mark was around there age and a unmarried.Next minute the camera zooms up and focus's on the granny and mark on the couch, what a shock. Both naked and granny is stroking mark's cock. Next Gran tells grandad to come around and sit on the floor in front of them, by now she was. Tina was looking him in the eye as he looked up and she immediately came to his side and stuffed his cock down her throat. Looking up and massaging his balls Tina moved back clearing her mouth and throat of his still stiff organ Tina said just wanted to keep it hard seeing as Roby is last in line. After a few minutes of Tina's mouth he was more than ready to go again and told Cindy and Lisa who they're licking and fingering Tina's cunt and ass to position themselves for more fun Tina hearing. She grabbed my hair and ground my face into her box as I licked and finger fucked her to an explosive climax which made her juices run down her leg. As I stood up she grabbed me and kissed me full on, slipping her tongue in my mouth. Unbuttoning my jeans they fell to the floor, she grabbed my cock and started to slowly wank me.I held on to her arm and turned her around, opening her legs I soon slotted my 6" into her from behind, I started to shag her in a decent rhythm, every time I thrusted. She silently complied, opening her legs to him, and guided his cock into her but it was a quick and adroit fuck that satisfied him more than it did her. When he came he just rolled over and fell fast asleep and left her laying there legs still open, mastuebating herself to a sad orgasm. It was these litle moments that she told me that inspired me to bring a sponantaity and level of emotion that did not exist in her marriage. I was more than up to the challenge each time we had our secret.