I'm not nearly qualified to chime in on this thread, but based on your bullet points, she sounds depressed and defeated. She needs to get that weight off, to build some confidence back up! She's retreated into her shell of home/online/TV, and is ignoring her responsibilities to herself, you and your home.
She's a good mom, huh?
Are you athletic? Maybe you could sign you and she up for a joint activity? My H and I used to group tennis lessons together, and had a blast!
I think the folks that belong on this thread may recommend reading Passionate Marriage, as well.
Good Luck! You'll get some good input here.
Me-46, D-21, S15, S13
After many years w/my head in the sand... I FILED Divorced 6/2011
The average woman would rather have beauty than brains, because the average man can see better than he can think.