Abi was letting out a little gasp each time I thrust in; her hands grasping the sheets, sweat glistening on her body, biting her lip to stop herself c...ying out. Her breasts, glowing with perspiration, jiggled back and forth. She was thrusting back at me.“Go on, Annie, just a bit more,” she gasped.Then suddenly I gave a final push and oh my god, my hand shot right up her, almost as if it had been sucked in. Abi screamed out. Amazed, I stared at her dark puffy labia clasped around my wrist. I. "So, you haven't seen a guy cum?" No, I know what it is but I've never seen it happen." Would you like to make it happen? You can do this for me if you want to."Well, it sure seemed sexy and I knew it makes guys happy when they get it done that way, I'd listened to a number of my friends talking about how they did it to their boyfriends, so I reached over as he let go and I took over for him.Wow was this sexy. Now, you might think that masturbating my grandfather wasn't the most erotic thing. As Colin got well into his rhythm I moved back to better observe his thrusting buttocks as he fucked my wife, his body flexing as he delved deep into her cunt, prompting cries of delight that I knew from previous times only served to hasten his orgasm, my sense of anticipation rising with every thrust as I knew that he was approaching his moment of extreme pleasure. It came as Bernice grunted and groaned into her fourth or fifth orgasm and this clearly proved too much for Colin and he too. "Sofia, you've given me the biggest fucking hard-on I think I've ever had!" I'm kinda turned on too" she said and she stood up and started kissing me again. As we kissed she slowly started to wank my dick, making it ever more solid - I thought I was going to lose my load there and then!After a few minutes, she took a step back and let her dress fall to the floor. Here was an 19-year-old wearing nothing but a bra, pants and a pair of high heels in my living room - it was getting a bit out of.