If she is still there at the end of the week you keep pushing, pulling, nagging, and doing whatever it takes to let her know she is now getting exactly what she wants.
You want out.. NOW you have it. You WANT him. Now you have him...
BUT you can NOT have me too and you can not expect to STAY here too. "This is for the best and it isn't working for me anymore."
That is your attitude.... You are not mean, you are not punitive, you are not talking about anything except her leaving and you are done. Nothing to talk about. She made her choice and now YOU agree with her. You don't want me to control anymore... NOW you have it.. No more control from me... Now you two lovers are free to be with each other, maybe even move in with him.
Allow her to deal the REALITY... Deep down you know you are showing more strength by telling her to go than you are by ALLOWING this and also taking the blame. Get tough. Push her into reality. Let her face what she hasn't prepared for...