I know that doesn't seem like a "life-long decision", but it could make a big impact in the way things unfold. For you to do that reactionally is not a good idea.
Just 10 days ago you were posting you wanted to invite her to dinner again. Now you don't want her stopping in? No. Until you feel the same way for at least a few weeks AND have a good reason I'd recommend not acting on negative feelings.
And, just my gut, I feel it is a little controlling. She's not acting the way you want so you're going to show her that by pulling back? She gets to be her own person.
If there's something completely across the line of course you can state your boundaries and enforce them. So if she's in an active A, or treating you disrespectfully in front of the kids, etc, let us know.
Otherwise I'd say talk more to us about what she's doing and don't rock the boat unless you have good reason to and those reasons persist for a while.
Me:38 XW:38 T:11 years M:8 years Kids: S14, D11, D7 BD/Move out day: 6/17/14, D final Dec 15