"And she is a married woman" (literally, possessed by a husband; Deuteronomy 22:22) means by the elevation of the husband. "And she is a married woman": Rav said, the husband was crowned through her, but she was not crowned through her husband. The rabbis say: she was the mistress of her husband. Everywhere the man decrees, but here, "all that Sarah says to you, listen to her voice" (Genesis 21:12). So too here, "All that Sarah says to you, listen to her voice."
Sarah Whose Voice Abraham Was Told to Heed
Yalkut Shimoni on Torah 89:4
וְהִיא בְּעוּלַת בָּעַל, בַּעֲלִיָתוֹ שֶׁל בַּעַל. וְהִיא בְּעוּלַת בָּעַל, אָמַר רַב, בַּעֲלָהּ נִתְעַטֵּר בָּהּ, וְהִיא לֹא נִתְעַטְּרָה בְּבַעֲלָהּ רַבָּנָן אַמְרֵי, מַרְתָא דְּבַעֲלָהּ, בְּכָל מָקוֹם הָאִישׁ גּוֹזֵר בְּרָם הָכָא (בראשית כא, יב) "כֹּל אֲשֶׁר תֹּאמַר אֵלֶיךָ שָׂרָה שְׁמַע בְּקֹלָהּ".