Don't ask her for ANYTHING other than get out! Get her luggage out. Bring home some boxes, and hand her a newspaper. NO MORE TALK! she knows you want her to choose! If you keep banging your gums she will run. Stop giving her a drama fix! If you can control your mouth, I think you will be successful.
Hi Ken, ya, I would go wtih WhatNow here... the important point is to make it clear when you do this that SHE is making a choice... and that you want her to make a commitment to her marriage... It has to be clear when she exists this is what SHE chose...