A Slice of Apple Pie

One day, Big Macintosh woke up. He then noticed, that he was very horny, so horny that he already was leaking from his ginormous cock and was throbbing. He then thought to himself, "Boy oh boy am I horny this morning...but why..?" It then hit him like his father used to hit his mother. He was in Love!!! That's right, he knew right then and there that he had a very special somepony. But this was no ordinary pony that he wanted to fuck. Oh no. It was, you guessed it, Granny Smith!!!! He had always loved his family, and his grandmother was no exception. But this love was different. It wasn't the love you would show a relative, but the kind of love that said 'I want to have anal sex with you. now'. And so! He knew that he had to act quickly, before sneaky Applebloom would steal his lover! So he ran down the hall from his love shack of a room, and bucked the door to his grandmother's down with his cock. But to his surprise, he found her granny, but she was naked!! That's right, she was naked. He then saw it all. She had red tits like apples, and her butt cheeks reminded him of apple pies! and she was also rubbing her horsey vagina with her hoof, cus that's what girl horses do, they rub their vaginas with their hooves. Granny Smith was soon close to cumming, when she noticed her very large, hot, and sweaty grandson at her doorway, but he was smiling with a big goofy grin, and she then noticed, that he had a giant black five foot cock hanging from his groin. She squirted a little. "OH Big Mac! What are you doing!? But better yet, what are you going to do...?"