Misrepresentation is a lifetime ban.
Applying for a new F-1 will fail because F-1 is a single intent visa, whereas with her pending K-1 she has already indicated immigration intent.
Even if she was currently enrolled in a school in the U.S. with a valid F-1 and I-20, because the pending K-1 is immigration intent, she would likely be denied entry, and possibly get a 5 year ban for an expedited removal.