take precedence over the terms of a will and/or trust. A will only controls assets that are not jointly owned and don't have a named beneficiary. A trust only controls assets that are legally titled in the trust.
I'm guessing that the wife was the named beneficiary or a co-owner on most accounts. If so, they all pass to her. For tangible personal property, the wife probably gets all of it under some sort of family/personal property allowance to the spouse under NV law.
End result: kids from prior marriage are screwed and may get nothing. I deal with this every, single day for the last 25 years.