Should I Cut Her Off or Not?

If you bring this up and she either denies it or shows no signs of wanting to do better, then you have a decision to make. You can either decide to reduce the amount of time together now that you know that she's not going to change the behavior. Or you can kind of reduce the expectations that you have when you guys do interrupt. Sometimes it's better to just address it and let the chips fall where they may. And maybe it's awkward, and maybe she doesn't take it well, but those the other things that you'll endure should you not address it. So we have to get there now.