What if his wife ignores his parents?

Just ignore your parents. She did not abuse them. Just too lazy to talk. Do you want them to quarrel as soon as they talk? So your wife is actually avoiding contradictions in disguise. You can't expect your wife to obey your parents. It's not the old society now. A daughter-in-law depends on her mother-in-law's face. As long as she did nothing wrong and abused the elderly, there was nothing wrong. Ask yourself if you are good enough for your mother-in-law. If your mother-in-law treats you like your parents treat your wife, can you still smile every day?