DownNotOut.. I think you have said it a lot more plainly than I could ever have.

QS, you need to find your balls here.. NEVER accept an optoin that your spouse dumps at your feet.. its a TABLE SCRAP

We aren't reccomending battle her at HER level and LIE and HURT her BUT, you CAN speak UP foryourself in ACTIOn by

Making your OWN choices, rather than only accepting those SHE gives you

Acting BEFORE she initiates action... That is, taking the initiative and the reigns of the marriage yourself.

If you let her drive this car she's gonna run it right into teh ditch...

YOU are behind the wheel YOU decide when to turn and how to operate the vehicle and you leave HER in teh passenger seat to wait it out...

Find your balls and find em fast...

I am suggesting TWO options coutner to hers

a. She MAY continue to live in your home DESPITE her lies and betrayal, PROVIDED that she agree to NO MORE internet/cell phone affairs in the home.. AT ALL - 100% respect on both sides while you both live there
b. If you don't think you can trust her - pack her crap into boxe and leave it at the dry storage and tell her she's not trustworthy and not welcome there anymroe until she acts like an adult

I would do THAT instead... If she won't agree to monogamy while livign in the home then toss her things out.. TEll her sorry, but you can't trust her and you DO deserve respect in your own home

Cut her off at the knees...