Ok what happened to her "complaints" about the oral sex??? Somehow that didn't get brought up?
It looks like you are in a tough spot IF you want to save your marriage. Like others have pointed out, you will need to go deep undercover, and if you really want your wife to see the light, you will need to work at it very very carefully, maybe over more than a year or two, to bring her around.
But the way she is treating you, invading your privacy, snitching on you to the elders, blatant use of sex to try to control you... you might want to think about Plan B...
I left my marriage because of similar issues, but in our case there weren't kids involved...
I wish you lots of luck, whatever you do....
No Apologies
(ps. when she scratches your back, tell her you have a headache)