"You don't have to recall anything; if she was alive, I would repay her, but she isn't; I could only bury her honorably." He was sad that she had died mysteriously and her body was buried in a hidden place, and also, he would take care of Minghao, who was her child, and hadn't told Tang Fei the truth about it. This was the only way and form to repay her life-saving gratitude.
He didn't know how she would take that news and didn't want to stimulate her after experiencing that attack earlier on. For now, it would stay a secret, he has been investigating for the reasons why Assassin Ice didn't know that she had given birth and what could have happened back then. And how did the kid appear in her sister's baby cot? How did the kids get mixed up?