This happened last Eid, but it has always been on my mind so would love to hear your opinions on this. On Eid late afternoon we got invited to DHs friends house, it was me, DH, our children, MIL/SIL, friends wife and baby in the house. DH and his friend went out for a bit to sort something out. We’re all sitting in the living room nibbling on food DHs friend has brought out to us. MIL goes into the kitchen to make tea, a bit later I go to use the bathroom and I can see MIL taking things out from the cupboard and putting in her bag, I ask her what’s she’s doing and she goes ‘ it’s fine, he said we could help ourselves’ 
AIBU to think this does not mean putting several chocolate blocks and other treats in your bag? Her argument is that what difference does it make if I eat it here or take it home? Friend lives in a big house, and had a lot of food/treats in the kitchen so I think this is why she did it. He ‘wouldn’t notice’.
She also does weird things like going to Asda and taking the bbq charcoal that’s sitting outside and putting it in the booth of her car, because she can’t be bothered to carry it inside and it’s only charcoal . After putting it in the booth, she goes inside to do her shopping like normal. I don’t really have a relationship with her, and stay away as much as I can. But on occasions like Eid I have to see her.
AIBU this is stealing and she’s just a thief in disguise?