You decide to lay your fears to rest for now. Something is making you feel more relaxed than you think you should be concerning your condition. Despite your entire life from this point on being thrown into question, you think it would be fun to try out your chocolate form. After all, whoever owned this house and this pool probably knew what the pool could do, and might even have a way to reverse the process. All the more reason to make the most of the situation.
You probe your body some more. It's strange to be feeling this slightly thicker body as if it was your own skin. You cup your hands under your heavy breasts and notice how tender they are. You see if you can squish your left arm in your right fist. You press firmly, then let go. The arm doesn't come free too easily, as some of it has melted to your hand. It finally separates, albeit a little messy, and a clear indentation has been left around your forearm.
Your eyes stray back to the pool. You return to it and wade in up to your chest. Dipping your left arm into the pool, you use your right hand to gather as much liquid chocolate as you can into the indentation, packing it in like snow. When you pull your arm out again, it's shape has returned.
The chocolate hasn't completely solidified around your arm yet, so you use your right hand to work your left fingers like a sculptor would knead clay. You compress your pinky and ring fingers together, forcing them into one single shape. You do the same with your middle and index fingers, and now you have two thick fingers instead of four normal ones. You giggle, thinking it reminds you of the Ninja Turtles. You flex the fingers and they respond as if you were born with them.
You quickly do the same to your right hand fingers, just for the sake of uniformity, and now you're down to six digits.
Another thought comes to mind. If your body could be modified, surely you could add to it as well?
You dip your hands in the pool to cover them in more molten chocolate, then bring them up to your forehead. You gently knead your chocolate skin into two stubby bunches, using the melted chocolate dripping from your hands to ooze into the unwanted indents you are making as you gather up the chocolate to make the protrusions. You make two inch-long stubs in your forehead before dipping your hands back in the pool to rewet them. You continue adding chocolate and coaxing the stubs farther and farther from your forehead. As they get longer, you gently curve them back and taper them off toward their tips. In a few minutes, you are sporting a pair of six-inch horns.
You get another idea. You wade back out of the pool to dry off...or harden up, as the case may be. You notice that your body is even bulkier than before, but only from your stomach down. Your paunch is even more pronounced, and almost folding itself over your waist. Your thighs and calves are thick with chocolate, and your feet are swollen. Your arms are thicker as well, but only from the elbows to the hands, because only those portions were being constantly dipped back into the chocolate.
You regard your fattening belly with disdain. You've never been that wide before, but even though it feels interesting to be heavier, it's a bit unbecoming. You take your three-fingered hands and press into your stomach, reworking the "fat," pulling it out and up, rounding the form. When you're finished, your thick waistline no longer appears chubby, only slightly wider. In place of your paunch, you now sport a pert, round belly that makes you look seven or eight months pregnant.
You pat it for a few seconds, wishing you were still able to giggle. Then you remember why you left the pool in the first place.
You walk around the side of the pool toward one of the ladders. With your back to the pool and bracing yourself carefully, you dip your butt and lower backside into the molten chocolate. After pulling it out again, you get off the ladder and go to work moving and shaping the soft chocolate above your butt into a stub about as thick as your new fingers. You have enough chocolate to pull it out about four inches. You dip your backside into the pool again, and now you're able to coax the protrusion to seven inches. It's long enough that you don't need to dip your butt into the pool anymore. You hold onto the ladder and angle yourself so that only the new appendage is in the chocolate.
It's working. Slowly you can start to feel it as if it's a real part of your body. You concentrate, trying to move it on your own. It's slow at first, but in a minute you're swishing your new tail back and forth in the pool. You keep it in longer, letting it gather more chocolate. After a couple more minutes you lift yourself up and back onto the marble floor. Your tail has gained much more chocolate, and is now hanging down past your knees. It's thicker as well, almost as thick as your arms. You marvel at how real it feels. You make it swish around some more, and curl itself up. Soon you're skipping around the room, belly and breasts wobbling, tail swishing behind you.
It's not long before you're exhausted. Your body is heavier now, and you're still not quite used to it. You return to the poolside to think of more fun ideas to try.