GH - I don't think I've posted to you before, but I read you regularly and this issue has really picked my interest.
It seems to me that you are making a lot of ASSumptions. OK - so there was a receipt for a pregnancy test in her pants. Do you know it was her receipt? No. Do you know she bought the pregnancy test for herself? Could have been for a friend/sister/coworker? Maybe.
You said she's irregular, well I for one know that irregularity breeds fear and if she has been under stress for some time, and you mentioned I think that she has a little bit of an eating disorder like PArob's wife she may have skipped a few periods and she's just making sure she's not pregnant to you or anyone else.
There have been cases of women who, under stress, have been eight months pregnant and not been aware of it.
For goodness sake - this changes very little - and there comes a point where it would be great to give her the benefit of the doubt.
Imagine how scared she must be if she does think she is pregnant. Be a supportive and loving friend to your wife - she may need that now more than ever - yes?
V
Never make someone a priority, who makes you an option.