My situation is somewhat similar, but not a castration per se.
As a teenager, I had several incidents of torsion of the testicle. Finally, in my 20s, I had an incident and this time the hospital botched things up. The testicle was destroyed. A few years later I met my wife and we got married, and have 2 great kids.
A few years ago I got an infection and that was also not properly addressed by the hospital ER. Guess what, I lost the other testicle. Now I am a enuch.
The settlement paid for, amoung other things, some implants so I look normal. My wife's libido had plummeted after the birth of our second child. So, when I lost my second testicle it was not like she was crushed. Initially, I took testosterone, but there were some not so pleasant aspects to it - it just didn't seem to work as well as the real thing. I was just too angry. So, with the doctor's help, I weaned myself off of it and enjoyed being calm. My wife and kids enjoyed me being calm too. But then, my wife's libido started to climb. I could still get it up, but I lost my drive to do so and it really takes effort to climax. My wife had an affair, I found out about it, our marriage nearly came apart, and then I found that the thought of another man fucking my wife really turned me on. I also found that I really enjoy prostate stimulation resulting from receptive anal intercourse and discovered that I am somewhat bisexual. So, we agreed to an arrangement. She can have male lovers, as can I.
