your parents told you to look after her, they are abroad on business

Your sister is 17 and you are 19

At night,

You sat down on the couch while waiting for her to come back home.. she told you that she went out for a while..

since the two of you have never been close

suddenly you hear someone steps inside

it's your sister, you are shocked when you look at her..she looks drunk? What's wrong with her?

"what are you looking at?!"

she sounds mad,while she walks towards you