Marcus started to tease Kelly and he would fuck her hard for a few minutes and then, he would slow down so slowly and would take about ten seconds to ...lide his cock into her. Kelly was going wild because she wanted him to fuck her hard and make her cum and Marcus wanted to make her wait. With just her hips, Kelly was gyrating her ass against his cock and making sure that she had him as hard as possible. Marcus whispered to Kelly that he was about to cum. Kelly said “Well. I guess this is. The haze of lust had been lifted and as I glanced at the jizz stained panties a second time, some awkwardness began settling in. Michelle... probably would not care for her panties being a masturbatory aid for her little brother. Perhaps she would allow it, not having much of a choice, but there was no need to upset her needlessly. "And what Michelle doesn't know, won't hurt her..." I muttered, wiping off as much cum as I could before placing them in the laundry hamper along with her bra. I. They had arrived and got settled in to our sons room, which was a bit cramped with 3 of them in there.Friday night had passed and they played their game on the Saturday. They had won too which was good because I don't think my wife could handle having 3 moody teenagers sulking around the house.As they where in high spirits and all 18 I decided to buy them a few beers and celebrate with them.After a few hours and nearly 24 beers later my son and one of the other lads headed to their bed. I think. But when their folks were in the house, Pete and Samantha knew how to be very secretive and careful in their relationship to ensure that their folks never became suspicious of how well Pete and Sam really got along as brother and sister.Pete and Samantha didn't always let their lusty hunger for each other just occur inside the privacy of their home. On occasion when Sam and Pete were out alone in public, Samantha especially would take the chance to play with Pete and tease him to make him hot.