Sun Yaozu?
After scanning his memory, Hou Zi replied, "I've never heard of this person."
"Sun Yaozu's wife is called Ye Zhixiang. She's Ye Zhifan's sister." Ye Jian told them what happened twenty days ago. She also told them what Grandma Ye said so that Hou Zi could use it as a reference when he investigates the issue. "… I don't suspect Ye Zhifan. I suspect the old lady from the Ye family as well as Ye Zhixiang."
Grandma Ye said that 'rumors are an invisible killing weapon'. Since she said it personally and rumors about her and Hou Zi were spread, Ye Jian could almost confirm that the mother and daughter were the ones behind this scheme.