Hello Erikad: I'm sorry you are caught in this difficult & confusing situation.

Hopefully coming here to PC can be of some comfort & support.
I'm not sure what I can suggest here. You know too well how things are with your husband & his family. Is it possible it could change? Well... I suppose anything is possible. But given that your husband is almost 50, this seems unlikely. So, from my perspective, I think you really have to decide if this is a situation you can live with. If not, then it may be best to do what you can to end this marriage now... if that is an option for you. I see you live in Turkey. So I don't know what options you may or may not have.
You mentioned having children. I do personally think bringing children into this kind of situation would be unfortunate. Plus, once you have a child, it will become even more difficult to leave this relationship behind.
I noticed this is your first post here on PC. So...

to PsychCentral… from the Skeezyks!

May the time you spend here be of benefit.
PsychCentral is a great place to get information as well as support for mental health issues. The more you post, & reply to other members’ posts, the more a part of the community you will become.

Plus there are social groups you can join & chat rooms where you’ll be able to connect with other PC members in real time (once your first 5 posts have been reviewed & approved.) Lots of great stuff! So please keep posting!