A powerful post, New'!
...how I agree now with a common cry I heard during my childhood that JWs broke up marriages.
Prior to both your decisions to marry and the ultimate wedding at the Kingdom Hall (assumed) who (in general), inside or out of the congregation, warned you of the possible eventuality you describe?
...she would leave me...on the basis...I no longer shared her view of the organization.
Perhaps in other words, the information you ask your spouse to contemplate threatens her association with the only social structure she believes she feels comfortable with, at the moment.
Flip