Hey Navajo-
I'm not one of the experts by any means but I certainly don't see a screw up. The only things that concern me are:
-How firmly did you set the boundary regarding OM?
-Is it CLEAR what the conditions of her living there are?
-HOW MUCH GAL'ing have you done/
-Have you changed to who YOU need/want to be?
-Have you required Transparency regarding OM contact?
-Does she have a time limit to find a place?

All I can tell you is that by your tone, your confidence still needs a little bolstering.

If you see this as a positive and that you CAN handle it (and you have set all the boundaries for yourself), your confidence that you have the upper hand should ease your mind and enhance your confidenec.

Are you prepared to go about your life FOR YOUR SAKE despite the fact she is there?

If so, I don't see this as a bad thing.

If YOU have changed and walk the walk around there, she may find less reason to leave.

Wait for an expert or two to chime in.

And you still owe me that story about your wife having you removed from the store she worked. smile