I ate the last piece of cake. It was for my sister's birthday she didn't even get a piece.
How did your sister react?
She wasn't to happy with me very upset unforuntately.
How did that make you feel?
I honestly felt very bad deep down inside.
That's alright. She's family, so she will still love you. Just learn from this mistake. 
I will. Having siblings you always fight and make up.