Maybe it was because Gem did not know her actual age and only saw her as a mere cat, but that was still a punch in Heize's grace that she tried so hard to keep by being the best in her business.
"I won't do that, okay? As I said, I promised Petunia my cooperation and I'm not someone who backs down on her words."
"Good to hear that, but I still hate you for attempting to replace Petunia with that dumb plan and spreading a werewolf chaos in the nearest town. Did you know that because of what you did there, Petunia sacrificed all of her resources into making that reverse potion that could potentially save her?" Gem asked but Heize could not answer because she just had access to these memories and it was not a good one.
She thought she deserves a beating for it and what other way to get a beating from something bad you caused than getting scolded by a literal child?