You didn't have yours made, you grew them organically. There is a huge difference. A guy walking up and saying "You have huge boobs!" to someone out of the blue is completely unacceptable. A guy commenting on a drastic change in appearance like going from B to D is something that you should expect comments about.
Most women I have known get offended if you don't notice a 1/2 inch haircut. I have been bitched out for not saying anything about an eyebrow reshaping. If I am expected to notice subtle little changes like that, I would only expect to be pummeled for not commenting on a "massive" difference like a boob job.
Also, I have never seen a woman get a boob job and then cover it up under three layers and a parka. Most usually wear low cut t-shirts that cling and show as much cleavage as possible. What is the point of spending thousands of dollars to cover them up.
This letter was just another cry for attention because the boobs didn't get her attention from the "right" guys. Of course, the really right guys would have nothing to do with a shallow chick with fake boobs.