Hug him
The matriarch naturally had the means and ability. She had never suspected her before and did not know that she had been poisoned.
Ever since her granddaughter had told her that she had been poisoned, the matriarch had been on her guard.
The matriarch had also discovered that the few doctors she usually trusted, as well as the doctors she had invited to the residence, had been bribed.
Furthermore, the slow-acting poison that someone had given her was problematic and might not be easily discovered.
Her granddaughter was the best. She had discovered it so easily.
The Grandmaster had also begun to suspect the confidants around her.
Since the matriarch had her suspicions, she could find the problem with a simple investigation.
Furthermore, with the matriarch's ability, it would be easy for her to discover anything.
The Grandmaster had no doubts about her granddaughter. If others had problems, her granddaughter would definitely have no problems.