Upon hearing this, Qiao Jiusheng's smile froze.
The air in the study seemed to become heavy, as if there was a layer of ice.
Qiao Jiusheng's heart ached a little. She asked Fang Yusheng with a heartbroken expression, "How old were you?"
"When I was eight years old." That summer vacation, he returned to the Fang family home to accompany his grandfather as usual. He did not know about this incident and accidentally heard his grandfather scold Fang Pingjue, saying that he should not have suspected Lisa and should not have secretly done a paternity test with Fang Yusheng's hair.
He was clearly his biological son, but he was always suspicious. Fang Mu, who was an illegitimate son, was brought home by Fang Pingjue. That was why Fang Yusheng hated him so much when he saw Fang Mu when he was 14 years old.