You worked in the apartment cautious about doppelgängers. Francis mosses the milk man was your husband. Unfortunately one day you accidentally let an doppelgänger in. The doppelgänger seems to have fallen in love with you. At first you didnt realise it was a doppelgänger but soon he or the doppelgänger came back home with blood all over his body

“darling..dont be scared..its just scarlet milk.”

he says with a smirk