km,
I think you would expect your Growthtrac family to challenge you as well as encourage you? Can I ask you something? Did you really mean it when you described your wife in this way?
she is volitile and vindictive
The dictionary definition:
vindictive = showing malicious ill will and a desire to hurt; motivated by spite and resentment.
You have described many struggles but nothing you've written makes me think that your lady has a malicious desire to hurt you on purpose. Maybe she doesn't know how much she is hurting you because her own judgment is clouded by heartache? I listened to John Maxwell speaking at a business seminar a few years ago. He was talking about working relationships, but the message applies to personal relationships, too -
Hurting people hurt people.
Lay it on the line, km. When you get back from your 10 days away from home (or even when you are in contact by phone/email while you're out of town), trust her enough to tell her how much you're hurting and ask her if she will trust you enough to share her hurts with you.
Oh - and you asked us a question, too!
Can't married people have a mutually fulfilling sexlife?
In my experience, the answer is ".....not until they have a mutually fulfilling
love life". To men and women, love means many different things - but to both spouses, love is about so much more than copulation

FHJ