My point here: if you have a wayward spouse or child, there are certain points that nothing you could say or do, not even boundaries, can stop them.
You don't understand boundaries, Angel. The purpose of having your own boundaries isn't to "stop them." It's to:
1. Protect yourself
2. Place more value on yourself (thus making yourself feel better ABOUT yourself), and then also, as a bonus:
3. It builds attraction (we tend to be more attracted to someone who places HIGH value on themselves, rather than LOW value).
They have absolutely zero to do with controlling or "stopping" the other person's behavior, altho they can LEAD to that, IF the other person chooses to respond positively and weighs your stated consequences for boundary violations.