The way you presented it to her was mean. It was cold and calculating and controlling. I was almost waiting for a "Me Tarzan, You Jane" moment.
Doesn't mean it shouldn't have been done. However you presented it, you didn't enforce it.
Waiting just seems like permission to give her more time to "feel out" what it may be like if she does take the calculated risk to leave you and go to him.
As clear as I can possibly be ~ If you are going to state a boundary, you have got to enforce it.
Otherwise, why bother?
May All Who Seek To Take My Life Be Put To Shame And Confusion; May All Who Desire My Ruin Be Turned Back In Disgrace. ~Psalm 40:14~