I can believe it.
I've had some weird treatment from various inlaws over food.
My SIL once hosted H and me for dinner, not long after we'd started seeing each other. I'd met SIL a couple of times before, all seemed fine.
At dinner, (me, H, SIL and BIL only, so not a huge deal), I got served half the meal - SIL hadn't cooked enough rice, so my portion was non existent, rather than everyone having a bit less, and I got given the smallest meat portion, as 'I know you're not keen on meat, Pandas' - no idea where she got that idea.
Then pudding. SIL announces that she went to the shops specially to get a particular pudding as it is so good. Only the shop only had 3 (individual tartlets). Again, instead of dividing them up in normal sane manner, SIL dishes out to her, BIL and H, with a chirpy 'you won't want one, Pandas, as you never eat much'. Again, no idea where she got that one from, as I'm not a delicate eater!
Utterly bizarre behaviour, but dealt out with such confidence that I found myself being polite and going along with it. I even apologised when she found me snaffling some toast later on (I was starving) and mumbled something about 'erm, well, I was hungrier than I realised' (wtf? Not as though I even had a chance to eat food earlier!)