Fun changes with Sally

You strip out of your wet butter-coated clothes and follow Sally up the stairs. She lays spread out on the largest bed in the house. Her body glistens from the butter like she just came out of the water.

This gives you an idea. You decide to make her a mermaid that changes only when covered in butter. You watch as her feet fuse together and then spread out forming a large tail fin. As her legs begin to fuse she moans in sexual bliss as if each change is an orgasm of pure delight. Soon her body is thrashing in the most sexual manner you have ever seen. As the fusion reaches her pussy, it stops leaving her pussy lips there for you to not only see but fuck as well.

As her legs take on a yellowish look, she stops thrashing and looks at you with a yearning of pure sexual desire. You wet your lips and touch her soft smooth tail that her legs have now become. Your cock is rock hard and needs to cum.

"So stud, do you want to fuck your mermaid first, or would you like me to get a taste of you?" Sally asks with a smile.