Hi,
Welcome to ehealthforum,
PAP smear test does not test for STD or infections. To test for infective cause, a vaginal smear/swab test should be done on the vaginal discharge. Few women can also have delayed appearance of symptoms (but the test done should be able to detect infection if she is infected). She should consider getting vaginal swab/smear test to rule out infective cause. If the treatment was taken by you, your partner and even your partner’s partner, chances of re-infection can be ruled out. For further clarification and assistance, discuss with your treating doctor/gynecologist.
Take care.