How should I respond next time?

I just arrived at a cottage with my family last night. It seems like most of us didn’t have the best night sleep

Here with: dad, mom, my sister, her husband and their two kids (3 yo and 1yo)

I wake up last, being the 30 y/o childfree woman that I am lol and go down to make myself breakfast. I greet everyone obviously

My sister, 0.5 seconds before I was going to sit down to eat, goes “can you take him” (her 1 yo, who walks) and I take a solid 2 seconds to respond with “sure!”

She then goes “wow everyone looks mad when i ask them to take him”

Wtf???? I just woke up, about to eat, can you not?
She didn’t even apologize after and kept saying “i just want to go to the bathroom can’t you just help me?”