I caught at another site and found this thread. Don't know if I can help but here it goes.
Your W's feeling of entrapment is her issue to be resolved and nothing you can do about it. It is coming from within, avoiding you, avoiding IC or MC is avoiding, telling you she wants you to go away is avoiding, contact with OM is avoiding, saying she can't support herself is avoiding, etc. I am surprised that you are not complaining up a storm here. Your W is frustrated with her own decisions and choices and lack of initiative to do anything for herself to improve her life. Then she blames you for it. All typical WAS stuff. She is full of excuses!
Having said the above - just to validate your sitch and not meant to hurt you or your W. If she is avoiding you and not expressing anger toward you verbally, then assume she is angry with herself for being in a position where her options are limited. If she needs space - feels dependent - help her figure out ways to become more independent. Is she interested in going back to school or vocational training to gain a skill and go out into the work force. Maybe her C should be vocational. Or, if she wants to get a job - that would help out the family finances. In other words, help her to discover or suggest ways she could feel less trapped and more involved in her own life and the M at the same time. What do you think?