[Maryanne]

If she has put on weight this will make her feel like shit, and then she will have to shift the blame from herself and will dump it on you. A great book to understand women is Men are from mars and woman are from Venus.
Its worth a read if you want to understand your wife, and take note of the earlier comment, try to fix the situation by educating yourself, as the family is worth the effort.
If it doesn't work you will at least be more aware of woman so that a second time around you don't make the same mistakes.
Woman are completely different logic to men, and if you can understand the differences it is much easier to accept.