K, I think you were right to confront her about this and it's no surprise that she denied and played dumb. You did well standing firm in the face of this. Her line that they booked together out of convenience is the kind of outrageous lie that only a WAS could deliver with a straight face. Now you've got to stand firm because if you back down from your position then she is going to see you as weak and easily manipulated.
Also while it is true that you can't legally kick her out, you can most certainly demand that she leave. And she might. So that's an option.
No matter what she says to try and "explain" things to you, just tell her you know what she's doing and you won't be disrespected by being lied to and leave it at that. The only way you should be willing to listen is if she is offering a heartfelt apology.
As a side note this news officially puts your W into the "wayward wife" category which is different than a WAS. Read through Sandi's comments in people's threads, she talks a lot about the wayward mindset. Your wife has zero respect for you right now so you've got to stand firm to get the respect back.
