In Old Zhou's view, Zhou Yin is an adopted son-in-law, and it's only natural for Manbao to bear the Xia surname. If she took the Xia surname, then these family assets should naturally belong to Manbao, and he wouldn't spare a single coin.
But since Manbao has always followed his surname, he didn't want her to change her surname either. Thus, he felt guilty, feeling these assets were left by the sister-in-law to Manbao, while also feeling that competing with the Xia family over the inheritance seemed unjustified. He was still mired in internal conflict.
Manbao, on the other hand, wasn't as conflicted as her father. These possessions were left by her grandparents to her mother, and then her mother left them to her. Regardless of her surname, wasn't she still their daughter?
Whether she claimed them or not depended on what happened after her biological parents left Shangzhou.
