Nedarim10: 3
נָדְרָה וְהִיא אֲרוּסָה, נִתְגָּרְשָׁה בּוֹ בַיּוֹם, נִתְאָרְסָה בּוֹ בַיּוֹם, אֲפִלּוּ לְמֵאָה — אָבִיהָ וּבַעְלָהּ הָאַחֲרוֹן מְפִירִין נְדָרֶיהָ. זֶה הַכְּלָל: כָּל שֶׁלֹּא יָצָאת לִרְשׁוּת עַצְמָהּ שָׁעָה אַחַת — אָבִיהָ וּבַעְלָה הָאַחֲרוֹן מְפִירִין נְדָרֶיהָ.
If she vowed while she was betrothed, [and] was divorced on the same day [and] betrothed [again] that same day, even to a hundred [men] —- her father and her current husband revoke her nedarim.  This is the general rule: As long as she had never entered into a state of independence for even one hour, her father and her current husband revoke her nedarim.