He is seven. DD is almost 16 months and a little monkey. It's almost impossible to do anything with her clinging to me and getting into everything.
I've asked DS to play with her while I make dinner. It's the worst time of day; kids hungry, dog getting underfoot, DH not home yet, etc etc.
He is having an absolute fit about it.
He had two and a half hours to play after school, and I am just asking him to watch her for a half hour while I throw some soup together.
I know I could make more slow cooker meals, etc and avoid the issue, and I do quite often. But I also feel (and have explained this to him) that we are a family and we all need to pitch in.
I'm dead on my feet (very early days of a surprise pregnancy :) ) and tbh I'm quite irritated with him. He's tantruming like I asked him to go down a coal mine rather than read a few rounds of "That's Not My Puppy" to his sister. 
My mother called and I said I had to go deal with the kids and gave her a brief outline. She said "oh well he's too little!" Really? I can see them, he isn't babysitting, he's just keeping her occupied.
Aibu?