Since "they" still have questions about this being hereditary, I see no harm in suggesting she get tested. Whether or not she does is a completely different story. In my sitch, my wife would turn around and say "but I'm not the one with issues".
Your W's lack of curiosity could be due to the fact that she knows she's grasping at straws. I agree with you, now that this has been dispelled, she'll find other reasons why YOU have the lead role in all life's problems.
Early on I would have told my wife the good news as a test to see where her head was, fully expecting, I'm sure, that she'd be happy for me - proving she still has love for me. That's not me anymore though. If things were fine between you, of course you would but now, if she wants to know, let her ask. IMO.u
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Me: 39/W: 37 D13-D11-S8 M/T 14/20
EA confirmed: 9/13/07 D-Bomb: 9/19/07 OM Gone since 12/18/07 W wants to fix marriage: 3/16/07