Wife is depressed and is on meds and is going to see a therapist every month. So good so far right?

Well, she sleeps a lot every day; does not exercise (won't exercise); is often frustrated; any advice from me is discounted; puts me down; no interest in sex (once a month or less for 3 yrs)

We have kids, and I spend my time trying to help them and shield them from her when she has no patience for them; the drugs she is on are expensive and health insurance does pay for a lot of it and we have to borrow out of savings to pay for the drugs.

Every day I am reminded that she was once a person I wanted to be around. No more. Now I just abide.

Any advice?