This sounds like fun!
I would say that plot twist: her wife isn't dead!! She's been living a lie because that wasn't her wife... it was something else... someone was trying to pass for her wife! Someone with superpowers or something from other planet :p! Her true wife disappeared a few months ago and now she has to find her!!
Ahahah just the craziest idea I could come up with xD!
Good luck with your series!! 
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