My fat wife is going to be the death of me...?

I work so hard at 2 fulltime jobs. I have to too support my wifes eating habit. She just rides her scooter from her bedroom to the kitchen all day and night. I have to spend 700 dollars of grocieries on her. She smells so bad I'm not able to sleep with her she refuses to bathe. I'm going crazy I don't know what to do? I only weigh 99 pounds and she's hitting 600 and she farts all the time and it smells sooo bad I want to cry.