It's astounding the degree to which this image could have been part of a Nineteenth Century collection of Orientalist (as opposed to "oriental") images made for Edwardian collectors. The iconography is perfect, IMHO. The only difference between this 21st century approach and those of 100+ years ago is that the female figures, while well-endowed, are slender, not plump. An exciting work.
Yes, I understand. Drawing small-breasted women has never been a problem for me, and I don't have quite the personal attraction to large breasts as many other male artists do. It does seem that such a fetish continues to resonate in the West. Interestingly, though, large breasts were not the attraction for European artists between the 17th-early 20th centuries, either, and especially among the Renaissance depictions of mythical women. Round? yes. Plump? yes. But large? No. The "Orientalist" tradition also did not emphasize large breasts. For the most part, full hips and plump bellies symbolized heightened sexuality. The advent of big-breasted women as sex symbols really emerged in the late Victorian and Edwardian eras in England, when the combination of narrow-waist corsets and butt-padding drove the fashion world.
Your concern about caricaturing is admirable, IMHO. There are a lot of wonderful 3D artists making bondage and other sexual images and posting them here on dA, but some really push the big-tit, "ideal" fetish to the point where what could be lovely art devolves into cartoonishness. And it's a shame. So to the extent you can find yourself tempering that tendency, you'll certainly have my support.