20 years! WOW, you are the "ride or die" girl. Think about the world 20 years ago, cell phones had no texting. The internet had no social media. Technology will shock him. He is going to take some time before things can go back to a normal relationship like before.

There are only a few places an inmate can spend money on, but be mindful that everything is super-expensive. starting with the phone calls... In my first month away, my wife spent over $6000, which translates into a lot more than $500/wk. Commissary is another area where an inmate can spend $200/wk easily if it is in their account. If there are daily fees from the jail, medical charges or fines, they could be debited from the inmate's account, too.

Send him a sexy picture of yourself (no private parts showing) and tell him how you feel

No, the inmate is granted the same privacy that you ore on the outside. If you don't trust him, stop paying for stuff

If you are thinking this, then you already know the answer from past experience. It's too much of a generalization to say "most inmates lie to their loved ones", but I've seen inmates be complete dogs to their wives behind their back. Some wives are blindly paying for their commissary, phone, and email. You know your husband better than anyone... if you are suspecting something, you know the deal already. If you want to keep paying but limit the calls

Not through any channel other than your inmate's truthfulness... but if you are asking you probably know the answer

  No me rendiría tan rápido. Pruebe con otra carta (tal vez a través de nuestro sitio) y vea qué sucede. Los reclusos entienden sus sentimientos fácilmente, es posible que deba ser más persistente de lo habitual

It does happen from time to time, more than you'd think. You will see articles in the news where they expose female guards having sex with inmates. These guards quickly become inmates themselves in the end.

only if they want to

let me ask my fiance for permission ;)