My friend put water in my vodka

I left a bottle of alcohol at my friends house and she brought it over today. I took a shot when she wasnt here and it tasted like it was watered down. Clearly she drank some of it and filled it with water. We are supposed to drink this on friday before we go out. Am i supposed to act like it doesnt taste like water and act like an idiot pretending its vodka? Or can i politely call her out? Its pineapple smirnoff🥲