Matthew-IP-7 t1_iye4gir wrote on November 30, 2022 at 6:47 PM

Reply to comment by RelativizingFrog in [WP] Your wife has an estranged sister that you have never met. She was murdered in a cold case soon after you were married. You brush off your wife’s new strange behaviour after the murder as grief. Until you find an old family photo of your wife as a kid, you shiver as you realise… they’re twins. by AUFunmacy

I think you could use foot fingerprints instead. I’m pretty sure babies get their footprints recorded at birth. So you could identify them by footprint record.