Am I overreacting?

stopped on the way home to get taco shells. Dont really even like them, but trying to get SK (15) to eat more things, she can be picky. Get home, put bag down, make dinner. Main oven part is broken, have to microwave the shells. Partner and SK come in the kitchen to get food, SK says “you guys microwave your taco shells?” Tell her oven is broken, new one being delivered soon. She says “so sad”.

They tidy up and put stuff away (nice) and she asks me what to do with extra shells. I say “idk” and take them from her, saying I’ll figure it out. SK says “you don’t know what to do with the shells??” I say no, I never buy them. I put them in Tupperware. Then she asks where to put the Tupperware. Partner/her dad says “idk, the fridge?” So SK says “you guys put your shells in the fridge??” At this point I get up and take the Tupperware from her and say “well then don’t put them in the fridge” and put them on the counter in a huff.
Partner asks me “what’s your problem?” And I say “I’m sick of hearing about these stupid shells!” And sit down. No more is said, but now I feel guilty for not being calmer.