The fact that (by all accounts) this was an act done while she was cam makes it worse, not better. Doing something in the heat of the moment I can get; thinking about it first is purely an act of control, and is a very cold thing to do. Parentling isn't all about rules and consequences; sometimes it is about empathy, and wondering what it is we teach our kids by our own actions.
I don't give a shit is she had the ipad repaired (minimum a hundred quid per repair and that's if you don't use Apple) or if she replaced. them. One message her kids got is, 'we are so fucking rich we can do this'. The bike thing I can actually get because a pissed off kid is better than a dead one; Fortnite isn't fatal.
Absolutely - the fact that she deliberately and wilfully destroyed gadgets that are worth probably about £500 sends a terrible message, which will be compounded when (no doubt) they both get replacement iPads in due course. The message is sends is 'I'm rich so I don't care about money and I don't give a damn about looking after possessions.
While the motivation is clearly much more reasonable, the approach is similar to the Bullingdon clubs antics - specifically burning £20 notes in front of hopeless people and trashing rooms in restaurants but then writing a huge cheque for the repair costs.