We made it home. Mom called a friend with a truck built for snow to pick her up for bowling. My sister left with friends after church and would be staying over somewhere else.
By 5:30, I'd find out if Grandma Gerte would be going along with my demands. The three of us sat in the living room watching "Murder, She Wrote" when I got my answer.
"Mom," my mother said to hers. "You need to go get ready."
"Precious, I am not feeling so well. It must have been something I ate earlier," she said. I nearly burst out laughing. "You go without me."
"You sure?" Mom said.
Grandma Gerte looked over toward me. "My grandson and I will find something to do with all this free time tonight. Or maybe I'll just go lay down.
"OK. I need a nice long bath," Mom said. "I'll be in there for a while. You know where the food and stuff is. My ride will be here in about an hour."
We nodded. They kissed each other on the cheek. Mom went into her bedroom and gathered some clothes. She headed for the bathroom and closed the door.
I couldn't contain my excitement with the coming evening's events. It may have been incest, but so far, it had proven to be the most powerful sexual rush I've ever had so far. I was in way over my head now and there was no turning back. Grandma was, too, and for all her prudishness, she knew she was in at least hip deep.
I stood up in front of her and lower the sweats I'd changed into after church. My long, thick fucktool waggled in front of her erect and hard enough to cut diamonds.
"Tell me you've never seen a cock bigger than that, Grandma," I said proudly. I wrapped a hand around it.
"It ... is ... so ... big. Dutch men have big penises, but yours is like a horse!" she said. "How could you be so awful? Are you so polluted with these thoughts that you cannot restrain yourself?"
I started stroking myself lightly. "Apparently not," I said. "Are you turned on by my size, Grandma?"
"No! No! No! No! You are my grandson! This is insane! I will not fuck you!" she whispered, though it could have been a yell.
"Yes, you will," I said. "But first, let's have a little fun."
I grabbed her hand and made her stand up. "You go over and start a conversation with Mom in the bathroom. Open the door slightly. I'll stand back and out of the way."
"What for?" she asked. She seemed puzzled and angry now.
"Just get up and go do it. You always have these conversations with her. But, I want you to talk about her as a teenager and how she grew up. Get her to talk about her tits," I said. God, I was so horny I could have cum on Grandma right then. But I had a ridiculously erotic plan to really blow my load.
"I will not!" she said.