When Ambassador Qin Dingkang said 'family problems,' he was referring to Old Madam Qin and his wife.
Old Madam Qin came from a prestigious family in the capital city and was most concerned about social status. Madam Qin was the same. She even had a deeper opinion than her mother-in-law. A pretty daughter from a humble family was not within the scope of her choice of a daughter-in-law.
Especially since Qin Dingkang had an elder brother and a younger brother. The wives of the two families were all from prestigious families, so Madam Qin paid more attention to this matter.
Old Madam Qin was still easy to talk to. Among her grandchildren, she liked Qin Xiu the most. As long as Qin Xiu liked someone, she would like them too. In addition, she was old now. No matter what happened at home, she didn't interfere. It was up to the family to make the decisions.
Hence, the only problem at home was Madam Qin.