Hi understandnow
Has your Dil responded to your note?
When it comes to these matters, I feel like there often isn't a real right or wrong. We do the best we can with what we know and I think it's very positive that you were able to apply the things you've learned here

Boundaries are primarily about protecting our own well-being. We might not be able to change the other person, but what we can do is change our own behavior and by doing so we can change the dynamics of the relationship (regardless of whether the other person changes or not).