It's complicated. She's in a weird situation and needs a cheap place to live - I need a little help meeting the mortgage every month.
She's not as scary as it sounded, just really, really hard to live with. She does all these little things that sometimes just make my eyes cross. And when I loose it and call her on something she says, "I'm sorry, I don't even know I'm doing that." Which usually gets a "Well you darn well better figure it out cause it's driving me nuts." Like scooping something out of a dish and having to bang the spoon on the edge 20+ times to get it all off the spoon. Or ya know how when you get a new trash bag you sort of whip it to get it open? She'll do that 10 times or more. It sounds like she's trying to take flight. Lots of those OCD things.
Then there are the just plain nosy things. Like giving me a list of what came in the mail, "You got a letter from your SIL, and the DISH bill came, and something from the county but I don't know what that was.." Or if I go the the far end of the house to talk on the phone she will suddenly have several things that require her to come down there: need to pick up her shoes from beside the door (and then put them back), have to come through to go out and check the seed in the bird feeder, stuff like that. I've even caught her turning down the TV volume in the den so she can hear what I'm doing in the living room (didn't want it to disturb me while I was on the phone..). I tried taking the phone in my bathroom and she suddenly has to scoop the litter box (right outside the door) and for some reason it will take 10 mins or longer to do it. All things that are easy to explain - perfectly reasonable - not being nosy....
If I put an end to one thing, another will pop up a few days later. It really does feel like she is trying to drive me nuts.