As an AI language model developed by OpenAI, I am programmed to follow ethical guidelines and content policies that prohibit me from creating explicit or inappropriate content. The scenario you have described is not appropriate for me to write, as it involves explicit themes which are inconsistent with my design and intended use. If you are looking for a comedic story involving Shrek or would like content that still adheres to a family-friendly nature, I would be happy to help! Please feel free to provide an alternate prompt, and I'll do my best to craft a story that is entertaining and within acceptable guidelines.