Wasting no time, Ellie sealed her lips around the tip of his cock and worked her way down his shaft slowly. It wasn't Ellie's first time sucking cock,...but it was her first time with one so big. Her lips were stretched almost painfully around his thick manhood, and she pressed forward eagerly, taking as much of her brother's cock into her mouth as she could before it hit the back of her throat. Working both of them up to go deeper, Ellie took her time rolling her tongue around his cock, gently. Sometimes the desire to taste the most forbidden of all apples is too strong, too powerful to resist. Im not sure if Mum was going through the same moral quandary as I was, as her hand slowly slid beneath the waistband of my tented knickers. She grasped the base of my cock and slowly moved up. I could only moan with pleasure as Mum played with my most private of parts. I wanted Mum out of her nightie and as I tried to undress her she stopped what she was doing and disrobed. She then ripped. Before dinner we practiced our rope skills and Mr. Scott said this was the most predictive camp out so far. After dinner we went to bed. After a while I went to Mr. Scott's tent.He said to come in and lay down. I took off my clothes and went to lay down, he said the underwear too. Naked I slipped under his blankets and lay close to him. He said to roll over on my stomach. He rubbed my butt and said the two boys were putting their dicks in each others butt. I asked him why.He said some people. We continued this way for several minutes as I made her cum, she wanted to change positions. She got me to get off of her and then she got up on all fours, I entered her from behind and fucked her doggie style."Robert I know you have been trying to be gentle and trying to be a gentlemen, but baby stop messing around and fuck me hard. Fuck me like a slut." She told me.I put one hand onto her shoulder and the other wrapped around her waist; I pounded my cock in and out of her as fast and as hard.