Not trying to hate on your head canon, but I feel like Martha would be bisexual since she had a husband. I'm not trying to say your head canon is wrong, it just might not be most likely
I gotta a theory about Martha and Mayberry. Episode 4 titled “C.H.E.R.U.B.S” We are introduced to a character called loopy and he wants to kill his business partner lyle who is still alive in the human world so Loopy goes to Imp. After he ask Biltz to kill Lyle Biltz says (from the episode btw at 3:56) “ if we do kill him, though, and he ends up down here you know you will be stuck with him forever” I think blitz implied that if you kill somebody in the human world and if your are a demon who did it you get stuck with that person you killed or asked to assassinate so maybe after Martha and Mayberry found out they were stuck together forever they started having feelings. (Just a theory notcanon)
