After watching the show with Piers…I think Gadd actually portrayed her empathetically vs the person she actually is.

Martha on the show seemed helpless at times. Like she couldn’t help it. Like it was beyond her. The actual Martha (Fiona) just seems cunning, is aware she’s lying and is so mean spirited with the things she’s saying about Gadd. Anyone who believes her is an idiot. It’s plain as day that she’s guilty.