Both.
It does compute when you realise that she is a scumbag who will steal anything. She's pretty prolific. A few months back, before we found out the entirety of what has gone on and the extent of the intimidatory behaviour towards their vulnerable neighbours we were not particularly ill-disposed towards her, whilst being cautious.
She asked my M-i-L for a lift into town, which was given, but asked for a detour to Waitrose for her to pick up some shopping. My MiL waited in the car. When she emerged and got back in the car MiL clocked that shopping back was full of steaks.
As I said, some people are just scumbags.