Hi honey, welcome to the forum, all my development is not due to just NBE, i had a hormone condition which meant i had very little testosterone, now this was brought on by taking bovine overy but it would still have happened to me later in life. But the NBE did cause alot of my development and even my gender specialist is quite suprised how it has effected me but even as a male i had some female characteristics, small hands and quite small feet, i was quite short height wise for a man and i had always struggled to build muscle so my specialist believes i never completed my puberty properly due to having a testicle removed when i was 14. So there are many factors to why i have had such results and i feel i have been incredibly lucky, even transexuals taking medical hormones, Only 33% of them reach full development and 28% have almost no development. Its hard to say if you will develop any substancial breasts, as it is with any of the women doing NBE its trial and error and finding whats right and what works. If you do start to grow breasts then your wife will notice, the first thing i noticed was my nipples enlarging alot and even this will be noticed by your wife as mine where huge and swollen and bright red, it was only a few months ago that my nipples actually settled down and shrunk a little and changed to a lighter brown colour. So its hard hun to know what will effect you, but your in the right place and people will be able to help but remember breasts are very hard to hide. Most of the methods in this forum should be safe enough to not effect your fertility or function and even if they did it would take years of very high doses to do it so dont worry there so my suggestion would be to make a routine and go for it and see if you get any results, it could take along time so be patiant. Anyway good luck honey and just to let you know you referred to me as "he" in your post, i am actually a she now lol but dont worry i get that alot lol.
Hugs Cheryl xxxx