:smile:Try saying something like, "Jane, we find it works best when we limit texting to the ____ of us. We'd appreciate it if you could contact us by voice, from now on."
If your relative will not respect your wishes, I would simply cease to accept her texts. When they arrive, delete them. Instruct your children to do likewise. Many phones have a blocking feature. If yours has it, set it up and the problem is solved. Don't offend unless it's unavoidable-and then let it be the relative's fault, not yours.