Leave the lies, disrespect, all relationship talk out of it.
Sit down and tell her that you all need to work out financial responsibilities (who pays what) while you are living together. If she wants to leave, then the best thing to do (talk to a L) would prob be to file for legal separation (so you're not responsible for any debts she incurs, etc...again, L!).
But yeah, ignore all the R talk, OM, etc. Won't do any good anyway and will distract you from the business at hand which is the financial discussion. Keep it just the facts.
