i could take it over easy but im sure you wouldnt really want sugar coating, i will just give my honest opinion, if you dont agree, tell me so and we can chat it through, its better that way.
interesting model, lovely eyes, expression, added interest with the tattoo which IMHO you have not really capitalised on. the neck is pushed downwards a little and its usually better to try and gain a little extension to the neck to add elegance.
the lighting is quite flat, would have liked to see more info here, it looks unusually flat and judging from the catchlights looks semi frontal and low rather than the 45 degree downward approach. some modeling in the lighting would have given more impact particularly with the edgy appeal of the tattoo (Which is a real work of art)
compositionally im comfortable with the negative space and the use whites, but see below .
The way the arms are cupping the boobs is a little awkward and im finding the hand on view is looking out of place and not as graceful as it could be. the crop on the bottom across the underside of the folded arms is too tight and its bunching up the torso and by cropping the top of the head (which isnt always an issue) it compacts the whole body shape a little too much.
with an image like this, its best to ask what is the main subject or why is it being taken and what will it say or convey to a viewer. for me here its the tattoo and its this that makes a statement about the models character. for me the torso is too full on, the head direct on / eye contact is great but a more angular position with the arm taking a more dominant position in frame would have said much more.
clearly you wanted a high key sort of look with the strength of the whites but to balance that the models probably too saturated and may benefit from losing some of the magenta shade castes and desaturating the skin tones.
although im sure the whites were intentinal and may even have been pushed harder into purity, i think the left side is probably too bright and almost looks as if the canvas has been extended without colour fill.
thanks for an interesting image to critique, id be interested to hear your feelings on the feedback so far.