It is true that a DUI arrest triggers both a criminal prosecution and a DMV proceeding. The fact that she has no CDL will make it a little more difficult for DMV, but they can track her using her SSN (if she has one of those) or her maiden name, which will be in court
records and which will still show up even after she marries (though it is possible that if she waits until after you marry and submits an application for a CDL in her married name, they may not catch it).
Keep in mind that in California, it is the driving privilege which is addressed by administrative proceedings, not the driver's license alone. So, even if you don't have a license, the driving privilege can still be suspended.
Because she submitted to a chemical test, there is no action against her license if it turns out that the BA was below .08, so it will not be a problem in that event. If it is .08 or above, of course, her driving privileges will be treated exactly the same as if she had a license ... and any administrative action taken will apply when she actually tries to get a license.
In fact, she should have already been notified that her driving privilege was suspended under the administrative per se rules, based on taking the blood test. That suspension does not, however, take place for 30 days, giving time for the blood results to come back.
See this DMV webpage on administrative per se suspensions for details of this procedure:
She also has the right to challenge the administrative per se suspension at DMV, but her request to do this must be filed with the DMV Driver Safety Office within 10 calendar days. See this DMV webpage for a list of DSO's:
Just to be safe, she should probably do this.
By the way, I appreciate your attempt to accept, but it apparently didn't take, as it is not showing as an accept. You may have to try again by clicking on the green "accept" button.