Becoming less tolerant of MIL

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MIL is here for Christmas. Announced she will be staying for 10 days.
MIL is very frustrating. Always has been. She is not nasty, just never listens, talks all the time, is very very disorganised, and well, a bit odd to be honest. She is a "helper" - wants to help with everything, but makes things worse.
DH knows all this, but is out at work most of the time - Christmas is really busy for him. So I am with MIL day and night. (DH in from work around 11:30pm).

I am finding myself becoming less tolerant this year.

AIBU to leave her by herself downstairs whilst I sneak upstairs for a couple of hours?
Any subtle comments I could make to the effect off "stop talking", "I've already told you that", "it's not your house", "no I was never on track to be a professional swimmer" (yes, she really thinks that's true because I told her once that I was in a swimming club when I was at primary school).

Sorry. Moan over.

I am absolutely fuming with DH.
When he has been at home he's been in the office doing his accounts. We've had words.
MIL has now moved on thank goodness.

It's hard to find her jobs to do, as she often breaks things whilst 'helping'. (hoover, dishwasher, and I had to stop the microwave as she'd put a metal rimmed cup in there and walked off. It was sparking.)
But we survived.

She just follows me around the house chatting inanely. I think she thinks I need the company. But I am used to being by myself, and am a rather insular person by nature. Not a big sharer. The complete opposite to her.
Even walking the dog she announces she'll come with me. Then it takes ages as she likes to stop and look at the trees/berries/leaves etc.

On the up side, I've had a lot of long lie-ins and early nights!!
Happy New Year everyone!

I don't know why you didn't send your wimp of a DH home with his mother, after reading that update.

Happy new year to you too!