"Refusing Aid"

Prompt: Tom, a 16-year-old boy, the son of a 39-year-old single mother, was gifted with immortality. He used it to complete quests in the adventurers guild. People's opinions about him were divided roughly equally between the bad and the good. One day, his village was attacked by a huge slime capable of melting anything inside itself. Tom tried to fight him, but neither he could punch slime, nor slime him. Finally, slug came up with an idea how to defeat Tom. He grabbed the person closest to him, who turned out to be Tom's mother. He gradually tore off parts of Tom's body and replaced them with parts of his mother's body. Since Tom was immortal and regenerated instantly, his mom's body parts grew to his body, completely replacing them. So he completely replaced his body with his mother's body, only his brain remained from Tom's previous body. Slime then returned back to his hideout, leaving Tom with his mother's body for the rest of his life. Tom went back to his house and looked at his new body. He was stunned by what had happened. At night, he put his hand on his vagina and gently put his finger inside. Then he started masturbating in his mom's body. In the morning he woke up and realized that all this was not a dream.