Current relationship issue

I'm currently in a relationship with an inmate. We have been dating for about 8 months now. Unfortunately our circumstances our not ideal with him being incarcerated and I currently living with my ex boyfriend (if four years)... Yes take a minute to re read that whole dilema. I currently can't move out because financially it's impossible and I plan to make a big move states away with in 1 year.

My current boyfriend is unhappy with the living arrangements but has been trying to be understanding. BUT lately he has been harrasing me to send him a picture of my ex so he can have an idea of who this guy is. I don't not feel comfortable doing so but he is determine to get this picture, even claimed to have people search my ex up. Now he has given me an ultimatum but I do not care to entertain...

Who's wrong in this situation ?

Should I just walk away ?

Any advice would do !!