You need to open up a can of whoop-ass on him!

If you can discipline without slaps, that would be the better option.

tbh this is kinda just funny

On the bright side it sounds like someone is raising your son right.

That’s where you explain to the twin, there’s always consequences in the world when you don’t do what you are supposed to do, or get into trouble. He should make note of what she did wrong, so as not to repeat the mistake. I’m all for spanking, under a certain age, and I don’t mean a beating, but an explanation needs to come with it. Once the child can understand what consequences are and can perceive what you say, you switch to time outs. I heard 1 minute for each year alive. But spankings should stop before age of 5. And they don’t need to hurt. A simple light swat on a diaper (which is padded and usually not painful) can get the message across without it being abuse. But use this as a teaching moment for both.