וַתֹּאמֶר שָׂרַי אֶל־אַבְרָם: חֲמָסִי עָלֶיךָ, אָנֹכִי נָתַתִּי שִׁפְחָתִי בְּחֵיקֶךָ וַתֵּרֶא כִּי הָרָתָה וָאֵקַל בְּעֵינֶיהָ. יִשְׁפֹּט ה' בֵּינִי וּבֵינֶיךָ׃
And Sarai said to Abram, “The wrong done me is your fault! I myself put my maid in your bosom; now that she sees that she is pregnant, I am lowered in her esteem. The LORD decide between you and me!”
Sarah gives Avraham her handmaid, Hagar, so that she can have children through her. After Hagar gets pregnant, Hagar thinks "lightly" of Sarah. Sarah blames Avraham. Why? What did Avraham do or not do? What was the main problem? From the text itself, all Avraham did was get Hagar pregnant which is exactly what Sarah requested.