OP is a selfish jerk; typical man.
Men are babies.
Your sympathy for this poor woman and her family (which includes her husband, BTW) is a real credit to you.
Have you been there? Taken care of the kids, the housework, helped your spouse deal with the side effects of chemo all while being the primary breadwinner? Worried about losing your job and knowing that it would mean losing the health insurance that is keeping her alive?
Both men and women do this every day, and I truly feel for them. Before you say he is a baby, have you dealt with this situation. It is a yes or no question. Answer it before you laugh into any stupid "well I know that I would" or "that does matter he is still being a baby". If you have not walked this path you have no idea how hard it can be. And, yes, it can be hard for a man helping his wife battle cancer since even in the 21st century our culture often expects him to devote himself to his work in the same way he did before she got sick.
She is usually on the couch with wine by 7:00.
While I have never seen proof that wine is a carcinogen, drinking it now is very unhealthy for her. I understand she may be depressed because I have been there. However, she will feel much better and have more energy to fight her battle, if she gives up sugar altogether.