Fill me in--spoilers
I was on the phone and missed some things.
1. What did Everett do to Fiona in 1992?
2. How did the killer get cursed in the first place, and how did he find out about it?
1. We never find out what happened in 1992 unfortunately. But it was enough for Fiona to justify framing Everett.
2 .Alan apparently came onto Hattie a year earlier and it creeped her out, so she made a charm that made him unable to feel desire for anyone. He lost all desire to be sexual even with his wife. He eventually found the charm and asked Seth what it was who told him it was a curse.
Hope that helps :)