Being stuck in the position your in has been your job for a year now. You have pretty much accepted your life now as a immobile fleshy body who's only purpose is to pleasure your owner in anyway she wants. Thinking today would be like any other day, you mentally prepare yourself for sex.
"I've gotten bored." Your owner says
You think she's gonna start having sex with you but...
"I don't like your sex anymore. Normally I'd enjoy sex with a captive for a few centuries but you got me bored in just a year. I'd normally do this after the 5th century with you but I will do this now."
You were shocked at her words. She hates you now and because of that she's going to change you into something else now.
"A good statue shouldn't be painted in ugly colours. It should be the colour of what fits with the surroundings. So let's make you like the surroundings."
In that instant, you feel magic take hold of you. Something creeps up from the floor onto you and when your eyes look down, you see the marble from the floor envelope your body. Your tail becomes a pure shiny marble and it creeps up past your hips and vagina. You don't feel the wetness from your vagina anymore and anything that is covered in marble feels fused to the ground and immovable. You feel at one with the building and your belly becomes one with marble as well. The marble then covers you chew and your breasts. All organs are marble as well spbyou don't feel your blood pump. Your breasts continue to pour out water and you feel the water rush into tubes from your tail and out your breasts. Finally your head becomes marble leaving your hair as marble as well and you can't think since marble fountains don't have brains, they shouldn't think. Your only a decoration that spits water out your mouth and breasts and water comes into through your tail.
The history of you now is your family didn't give birth to you. They did a family project to sculpt you as a stunning mermaid statue and sold you off to the mermaid disguised as a human. She altered you slightly so you were a mermaid fountain attached to the pool side.
What happens now.