My mother sent me to get curd

My mother sent me to get curd. She said "400 gram dahi le aa, aur haan, wala wala shop se mat lana, uske paas khatta hota hai." I went to the shop near our house in Shimla. I completely forgot which shop she told me NOT to go to. So I stood there for 2 minutes in front of two shops, trying to remember. I called her. She didn't pick up. I just guessed and took it from the first shop. I came home, gave it to her. She looked at the packet and said "Ye toh maine mana kiya tha na." She still used it. For the whole dinner she was like "dekh khatta hai na, bol rahi thi mai." It wasn't even that sour. But I just kept eating quietly