Older sibling issues

My four year old is becoming an absolute terror... she’s a very sweet girl but has a quick temper and is very emotional.

There’s been listening issues even before babies were here but I feel like she’s just bringing it all out now with her twin siblings here.

Yesterday she threw a rock inside the house at her older sister because sister wouldn’t share a hair tie. Luckily missed her sister.

Now today she’s kicked and punched her...

I’m dealing with her and will continue what I’m doing, so don’t really need parenting advice, but I just needed a vent source!

Hope everyone else’s older siblings to their May/June babes aren’t being as difficult as ours are!