Jiéhūn yǐhòu, tā hé lǎozhàngren de guānxi yìzhí hěn hǎo.
Since the wedding he has always got on well with his father-in-law.
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老丈人 is how a husband usually talks about his wife's father, warm and a little jokey. 岳父 is the standard word, used in writing and in polite introductions. His wife's mother is 丈母娘.