I'm sure 25 would have a much better response from the legal aspect, but, I believe income is considered community property. From a legal standpoint, you may be out of luck...
If you have the ability, it never hurts to stash some cash on the side, but I don't think I'd put it in another bank account.
It's probably a completely different story if you have a separation agreement where you both agree on the separation of debts and assets...
