Study Nedarim folio 68B with parallel Hebrew-English text, traditional commentary, and modern study tools. Free access to Babylonian Talmud online.
But if it is a case where the husband of a betrothed young woman heard and ratified the vow, or where he heard, and was silent, and died on the following day, in which case his silence is considered ratification of the vow, then the father cannot nullify the vow.
If her father heard or was made aware of the vow and nullified it for her but the husband did not manage to hear of the vow before the father died, this is what we learned in the same Mishnah (70a): If the father dies, the authority over her vows does not revert to the husband, i.e., a young woman’
If her husband heard and nullified the vow for her, and the father did not manage to hear of the vow before he died, the husband cannot nullify it, although she no longer has a father, as the husband can nullify vows only in partnership with the father.