The visa doesn't change merely because of a divorce.
Sure, she can use it to come to the US for a SHORT VACATION.
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Nothing happens to the B2 after divorce, not dependent on her marriage. She would need to enter with the intent to visit for a short time, e.g. 10 days as you say, is fine.
Due to the nature of this forum, Attorney Maria J. Marty does not have all the information required to provide legal advice. Accordingly, her responses on Avvo are intended as general and not legal advice.
There is no connection between marriage and B2 visa unless the marriage was used to show ties.
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