Good luck in your divorce. I hope that you'll be able to keep your miles somehow. You might want to throw the following OnePass Account rules back at her lawyer:

Account Ownership

You can have only one OnePass account, which is established under your full first and last name (no initials, please). Only you may accrue mileage in your account. You may not transfer or combine mileage between your account and other OnePass accounts, "including those of relatives."

If they find a legal way around the above, then might I suggest the following:

Buy something expensive at the Continental/ebay auction site www.continental.ebaytravel.com .

Redeem three Easypass BusinessFirst awards for your 600k (the awards are around 200k apiece). You don't have to use them, just redeposit the miles after the divorce is finalized.

Setup a Hilton HHonors account and transfer all of your miles over (unless you already have one and she knows about it).