“I can sort that out for you Sir” Tristan said and I told him he might want to take his shirt off as it was hot outside. He had a good body on him...which got better being without a shirt.“Right, let’s get sorted with this dusting Gramps” Mary said as Tristan went out to the garden and started work.I am sure seeing Tristan was the reason I was getting a chubby or was it the sight of Mary reaching up to the ceiling with the duster showing off a smooth midriff and her shorts tightening as she. " "Come here," she whispered. I leaned over, and she put her arm around me, and her hand on my chest, which she started caressing. "I know this is wrong and bad, you being my brother, but I don't care." She then leaned in, and pressed her lips against mine. My sister and I started to make out, her hand caressing the back of my head, my hand rubbing her shoulder, and both our tongues inserted in the others mouth. My hand moved down, and started groping Heather's breast, and her other hand. “Henry, if you ever tell anyone you’ve been here,Butch’ll kill you. You know that, don’t you?” I nodded.“If he doesn’t, I’ll cut off your nuts and make you eatthem. Do we understand each other?” “Yes,” I gasped. “Take your clothes off.” “Wh-what did you say?” “I said take your clothes off. I want to see you.” “I can’t, Patty. Please don’t make me do that.” She kissed me. Once he got out and went into the store she got back in the car. As she did she tugged on her own shorts like she had a wedgie then plopped down in her seat. I jokingly said to her: “What’s the matter? Your b*****r’s big dick stick your pants between your butt cheeks?” She looked at me in surprise and replied, “Oh my God, you saw that?” I told her, “Well, it seems he’s got a pretty big one so it wasn’t too hard to notice it when you got off his lap. Did that turn you on, I mean his cock.