abducted

So I came home tonight to find all the lights on and my sister's car home so I assumed she was around. I hauled my groceries into the kitchen and then noticed the massive bottle of tequila and 2 shot glasses. Now I began to wonder if she was home but um "busy" in her room since I didn't hear her say hello when I came in. I surreptitiously checked to see if her door was closed. Nope - no sister. The obvious answer here is that she's been abducted by aliens who like tequila.