(Mishnah): A Na'arah (a girl in the first six months of adulthood) Me'orasah (after Kidushin but before Nisu'in), her father and husband annul her vows;

If her father annulled but her husband did not annul, or the husband annulled but her father did not annul, it is not annulled, and we need not say that if one of them affirmed [the vow, it is not annulled].

(Gemara) Question: It says "v'Im Hayo Sihyeh l'Ish" - what is the case?

If she is a Nesu'ah - [this cannot be, for] it already says "Im Beis Ishah Nadarah"!

If she is a Penuyah (single) - [this cannot be, for] it already says "v'Ishah Ki Sidor Neder la'Shem"!

Note: I do not understand the Havah Amina that "Sihyeh l'Ish" can discuss a Penuyah.

Answer: What do we learn from "v'Im Hayo Sihyeh l'Ish u'Nedareha Aleha"? Who is this? It is a Na'arah Me'orasah. Her father and husband annul her vows.

Question: This refers to vows that she took after Eirusin. What is the source for vows that she took before Eirusin?

Answer: "U'Nedareha Aleha" include vows that she [took before Eirusin, and] 'brought' with her from her father's house.