But the problem is....why did u eat her cake

I agree with her, and buy her another cake won't resolve the problem. it's like you killed her dog, and you say "oooh don't worry i'll buy you another

"
The problem is like.... YOUUU. sorry to say that but seriously....
you walk in your home, then you open the fridge....and you see WAWWWW a cake that seems reaaaally good. Didn't u ask that this cake was for your sister ?
no sure no.
you was just thinking about this fabulous & delicious cake that could be in your belly.

it's ok, you're human.
But do not say that you're sister is mad.......because in this situation....YOU are mad. (of the cake) lol
