First of all, thank you all for the positive thoughts and the input. I appreciate every single word you wrote. Thank you!
Since day 1, my wife has known about my crossdressing and she always drew a red line in "changing your body". She made it clear that she is married to a man and nothing else. I am not transitioning and I never would, and I accept the fact that she needs a man: a man I want to keep being. I only wish she could accept a pair of boobs on that man, yet I understand that it's not easy.
Anyway, I am not unhappy. She is a wonderful wife and the fact that she copes with my crossdressing makes her a rare catch already. Apart from that, she has at least 102843985743986704 more qualities that make me believe that I hit the jackpot when I met her, and my fetish for boobs is not woth jeopardizing even a cent of that.
The way I feel now is more like a kid whose friend broke a toy of. Sad? Disappointed? Watching my 8 y/o taught me that it'll pass. Yet, my 45 y/o me tells me that there will be a time when things will be more acceptable, probably in 10 years, and I will take full advantage of that.
Will we grow boobs together? It's unlikely, but I tried. My wife has been in premature menopause for some time now and she is starting to lose some hair because of it. I offered to give her "the herbs" that I was taking for mine (PM), which I believe could actually have a positive effect on her. And, yes, she could grow bustier because of them, but so far she said no. It would be interesting indeed if we grew a couple of sizes up together... and we could exchange bras even more than we do now (yes, it happened... so validating

).
My plan is, in a month from now, to see the doctor and do a full body check up. If nothing is too wrong, I'll try to convince the doctor to prescribe some estrogen on the basis that I actually felt a lot better while taking it, which is not a lie. Wee2er is sharing some very valuable insight from that point of view (dealing with the NHS) and I think we'll collect some interesting intel between the two of us, which I will share here. I hope that my wife will keep her very lightweight approach to any changes that might come. We'll see...