We watched the movie for a while and I switch over and layed on my back. Grandma continued to rub her hand across my chest and down across my stomach... I really wasn't paying too much attention and I guess she wasn't either, and soon, she started rubbing across my hips, moving over my crotch. Soon, she took my little d**k in her fingers, rubbing it back and forth. Like I said, I wasn't paying attention and soon, my d**k was rock hard. Well as hard as 3inches could get.It must have felt. I licked it all over. Tasting him. Breathing him in. I felt it get hard in my mouth. I pulled back and looked at his throbbing hard cock. So big. So thick and veiny and so so hard. I took it back in my mouth and tried to take it deep but it was so thick. I took his hand and put it on the back of my head and he got the idea.He pushed me down on it. I felt him entering my throat, stretching it. He pushed more. It hurt and I knew my throat would be sore the next day but I needed it. I needed his. Tanya got up and slapped my face hard, and pulled me over between her well formed legs."Fuck me and hurry up you dumb cocksucker...I need your load now!!"I pushed my hips inward and she grabbed my semi hard pecker and jacked it off roughly."Get a fucking hardon asshole or I'll make you pay dearly!"She wanked me off unmercifully and fortunately I had some control left, and just thought of her perfect body and pretty face. I became hard again, at least enough for fucking, and she grabbed my balls. I picked it up and brought it to her. "You did much better than I would have expected. Being a good sub isn't a skill many people pick up so quickly. You didn't even touch yourself or blow your load. I'm impressed." She hit the cigarette and passed it to me. "I think it's very important in a Dom/sub relationship, for the Dom to make sure to bring the sub back to a safe state of mind afterward, and not to let them become confused about their value. You are not worthless, that talk is just for.