Need help understanding something! !

Soo me and my wife has been having some issues in the bedroom. She has been out for a couple months ( bad economy) and my have picked up a couple pounds. When it comes time to get busy I get really tired of doing all the work. Like sometimes I wanna be seduced but it never happens we talk.bout it all the time. It's gotten to the point I'm bout ready to stop knocking boots. But she says she doesn't like to take control plus thinks she's horrible because of the weight but I tried to tell her she's still beautiful to me. But she still won't ride or take control and its very very very annoying now. I don't know what to do. Help! !!