Back in the mists of time, I had a council house, and a lodger who rented a room, who I had known for yeeeeears as a friend. All went reasonably well...
Until his Mother came to visit. Now he'd known me a good 5 years before we lived together, he knew a lot of my past and particularly, knew that I absolutely cannot stand conflict, and would not tolerate screaming arguments in my home.
I knew his mother could be a tad on the dramatic side, prone to loud shouty exclamations - something she'd always said were an inherent part of her Central European/Mediterranean heritage - so I again said, when the visit was suggested, that she was welcome... but. No shouty shouty shit.
Day 1... she pissed me off by dramatically banging on about how terrible our food was and we didn't have xyz vital household items but not to worry darlings she would buy them for us.
I said no thankyou, I couldn't afford to pay for such things (nor could he but she's his mother), did not need them, if she wanted to buy food for herself thats fine but none for me.
She buggered off to the shops came back with a TON of stuff, household goods, food, huge woe about how there wasn't a Waitrose in town (nope, northern town before waitrose became a 'thing' further north than Watford), so she'd cleared out M&S instead.
Foisted these things upon us, insisted on making lunch so we ate...
Then got into a huge strop when presenting me with a bill for all the stuff she had bought (hundreds of quids worth!!), fully expecting I would pay it.
I told her no... she stropped off to her (sons) room and rang her husband to bitch about it.
Day 2 - house mate reveals to her over what was already a fairly frosty breakfast, that he'd conned her in some manner (money given by her to him for something specific purpose, spent by him on something totally different and undoubtedly frivolous).
So over my breakfast, she starts a HUGE screaming row with him, full on stand up, knocking coffee mugs over, terrifying the dogs roaring in each others faces sort of thing.
So I kicked her out of my house - she was in absolute disbelief, told me how dare I, a child (23!) kick an adult out of the house (my house!).
She eventually fucked off, she'd been due to leave that evening anyway, but only months later would repeatedly ask to come and stay and was absolutely shocked to her core that I said no!