Avraham just finished doing akaidas yitzchak, one of the most powerful spiritual experiences ever. Right after that, the Torah talks about Nachor and all the children that he had. Why? From spiritual heights to a man that worships avoda Zara? Maybe it’s to teach that even if you are on a high level and close to Hashem, you are still supposed to maintain connections with others, especially to your family, even if you think their not “on your level”. And because Abraham did this, he found Rivkah, Yitchak’s wife and the second of the Imahos.