Sounds to me like she has real issues with her inadequacies and general low self esteem - I am not saying she truly has any inadequacies and/or low self esteem but she definitely seems to be portraying that (IMHO)

(1) she feels bad about herself in general (weight, etc.)
(2) can't get pregnant (so she blames you - easy to blame someone else isn't it?)
(3) goes back and forth about wanting and not wanting kids (she probably truly does but doesn't want to disappoint herself and/or you if she can't get pregnant AND she is fearful of not being able to be a good mother (due to the lack of self esteem and the past issues relating to the two girls)

Heywyre

M - 57
H - 65
1st A-bomb - Nov 27/02
2nd A-bomb - Dec 13/06
together 21 years
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Insanity is doing something over and over and expecting different results (Albert Einstein)