[...] I think it came out alright though.
I congratulate you on this astounding piece of art. Rarely have I seen such a well executed morph: You did manage to make he boobs huge, yet you let them rest high enough for my taste; You did match the lighting and shadowing perfectly, and most of all, the choice of this situation is just wonderful.
There are some minor flaws, though, some of them not even being your responsibility. For one, the original resolution is crap. I have seen the unmorhed picture before and decided against working with it due to the low resolution. Second, there is grain all overall the original image, and I think the grain size of the original and the resized/painted boobs does not match. May I suggest you to apply (assuming you use photoshop) a noise filter, set to monochromatic gaussian noise, about 0.5-2%, then applying a gaussian blur, about 0.1-0.3% iteratively, until you reach a similar grain?
Don't let my criticism get you down; I just want to see great art become even greater.