Just come back from a week with my MIL. Before I get bashed over the head with the ungrateful mallet. She is lovely, kind and loves DP and myself, and the feelings are reciprocated.
However, she has lived on her own for some years, and has seemingly developed certain ways of doing things.
She eats like a sparrow, seriously. Nothing all day until 8pm when she eats a small snack. I had to resort to driving to the petrol station and sneaking in snacks! She lives in the middle of nowhere which meant no shops in a five-mile radius. I had to go and buy breakfast items, and tinkly laughed as I put them in the kitchen.
She has never driven, but spent the whole week sighing as I drove 'the wrong way' to everywhere. I have never lived there, and used the sat nav to get about. She also didn't know the way, but was convinced I was driving aimlessly!
She smokes indoors, the house reeks but she told me that roll ups don't smell 
. I don't smoke and spent the week quietly spraying air freshener in our room to try and keep the room fresh. I was forbidden from opening the windows as 'it let's the flies in'.
She lives 300 miles away so this is a yearly event. By the summer of 2022 I shall have forgotten the trauma and will be driving for four hours to do it all again 
.
Anyone else's MIL drive them slightly batty? My patience has been tested a bit but she's awesome in a unique way.