It certainly is a good display of water splashing around. Very nice. I've read that water is hard to draw.
It's interesting that she knew what to expect. That suggests that she has been down there before or that there is something about that area that tells her she can take a shower there. Maybe the possible towel rod on the wall told her what to expect. It is a fascinating look at what might be a fairly mundane, everyday use of magic (after all, what is keeping the water from making a mess?) or possibly just a tiled area with other methods of limiting where the water splashes.
I vote for magic, since that alcove is very shallow.
Since I can't get a good look at the spot, I can't guess which.
It can be difficult if you're going for a super realistic style with lots of diffraction - but less is more in this case. Notice I didn't really draw any water, I just drew some shiny bits in the air.
>It's interesting that she knew what to expect.
She looked around a bit when she first "arrived". I can't show everything because it'd take up too many panels. Also I'd have to think of everything in advance.
>magic
Eh, I think if you're going to build a huge demonic summoning/containment feature into your floor, you'll probably take the time to make it drain properly. The "towel rod" is actually a lever that controls the water - it's strictly mechanical. I'd imagine each of the alcoves addresses some need, much like the elements on the points of a traditional pentagram.