completely spiteful 11 year old auntie

[bigfam]

I've posted about her before, she's my other half's auntie, but this time I'm completely shocked at her behaviour.

She comes round to play with our kids quite often, and whilst round the other day my 6 year olds tablet got smashed, the story is;
They were sat on the stairs and auntie 'double dared' my dd1 to kick dd2 (who's 3) down the stairs while she was holding the tablet, dd1 refused and said that auntie then kicked HER and she accidently knocked dd2. My 6 year old just wouldn't lie but on top of that dd2 also told me 'auntie kicked me down the stairs ' and she definitely wouldn't lie either, basically because she doesn't understand a lie, iyswim.
Anyway when I asked what happened auntie went on the defensive, stomping round and wouldn't talk so I left her alone.
When mil came to get her I told her what had happened but she was more concerned with her dd being upset, and when she came round today (mil) with her dd she had the balls to be sarky and say '_ don't go near anything electrical for goods sake'
Its not just the fact my 6 yo's tablet is broken, that actually pales in comparison to the fact that my kids auntie deliberately tried to push/get pushed a 3 yo old down the stairs!
Sorry for the rant, I'm just still furious.

No I'd never leave them with an 11 year old, sorry if that wasn't clear. If I asked my mil to mind any of them I'd take them to her house, and their auntie behaves differently whilst at her, with her mum, around my little ones

*at hers
Fil (her dad) is a part of the family, but works a lot of hours and when he isn't at work doesn't tend to spend a lot of time at home, they live on a farm so there's always something he finds to do

Wow, she sounds awful.
I think you need to distance yourself, don't invite them round and don't use them for childcare eg for Drs appointments, you will just have to take all the kids to Drs, we don't have family nearby so I know it's a pain but it's better than all this carry on. Start being firm when she does come round ( I am assuming they turn up uninvited or pop in regardless). Write out some rules, stick them up and tell all the children together the rules and the consequences. E.g no playing on the stairs, no rough play or hurting, be careful with things. If they stick to the rules they get a treat e.g ice lolly out the freezer, tv time or whatever, if they break the rules they get a consequence e.g no tv or auntie has to go home. If you treat them all the same it won't look like auntie is being singled out. The may be no rules at auntie house but she is olde enough to learn that thee are at your house.
Good luck, I think you are very kind to have her round!

it looks like a lot of emphasis is being put on her being an auntie for some reason

At the end of the day she's a child the fact she's actually their aunt doesn't make her any more responsible than any other child her age. I'm not sure why the constant referring to her as auntie is necessary.

No advice just sympathy. Kids can be horrible some times and that one sounds well below par. She sounds like that child in orphan. You can't have your eye on them 24/7. Ecpecially with 3 kids to take care of.

"My 6 yo doesn't lie"

I assure you that every single 6yo could and would lie to get out of trouble.

Not saying yours did here. But they could and would have.

I think you need more evidence than "she said he said" before you go in all guns blazing