First, I'd go with the color. I love monochrome but for a variety of reasons (the light on her hair, the DoF), I think this shot works better in color in this instance. Lovely work by the way and wow she's an expressive model for this kind of work.
Second, yes--I'd start out your thread by putting "NSFW" at the front of it (your previous threads have had it at the end or in parens or some other variation). If you didn't know, there is a NSFW Forum. And you don't have to have nude photos (could be lingerie, could be suggestive "implied or demure" photos) to be in the NSFW section. But the idea is to limit age access and also prevent something popping up on someone's feed that in some offices would get someone fired or reprimanded. In any case, your work would be a welcome addition to the NSFW forum.