You have to let them know there's going to be a consequence to their behaviour. Don't spring it on em after they screw up, cause then you get back to square one. If this gets talked about, don't expect me for christmas. You can say, hey, i thought we agreed not to talk about this. And if they like thei're like, oh, ye, we're sorry and then don't say anything else. That's how you set a boundary,. You say, like, hay, here's the boundary. I'm going to play this game with you, but if you cross it, there are going to be consequences. The first thing is that