Obviously, Sandy did not know what was gender discrimination because it was the correct principle in the Beast World to always let females have priority access to all resources.
However...
It was the correct principle for females in the Beast World to be willful, especially the First Beauty of the tribe like Gu Mengmeng. Whatever they wished to do, they would do it. Let alone a mere water shuttle, even if Gu Mengmeng picked up a rock from the ground and claimed it to be a delicacy, males would still stand out to chew it into powder form and comment on its good taste.
Anyway, males would be the one who finishes the bad-tasting food so Sandy did not persist further and treated it as playing around with Gu Mengmeng. Thus, she nodded her head and said, "Alright then, I'll follow whatever you say but let's make it clear that after you roast the water shuttle, let's roast meat."