I'm going to have a brother soon...weird!

Background:
Last night was my sister's bachelorette party. She's getting married this coming Saturday. I mostly stuck with the Sangria last night. For anyone who may judge me right there, and think I'm horrible, who's to say it wasn't virgin? Anyway, basically, it was a fruity drink, which is my favorite, so I drank that all night. And yes, I DO brush my teeth every night before I go to bed. This information may sound strange now, but you'll soon understand.

Story time:
This morning, I found a half-full bottle of Coke Zero, and grabbed it and started drinking right out of the bottle. I drank about half of what was left, and then we decided to go out for brunch. Well, as we were leaving, my sister's very-soon-to-be-husband got home from his weekend with the boys. We asked if he wanted to go out with us, and he declined. So off we went.
Well, when we returned, I noticed that my beloved Coke Zero bottle had gone missing. I asked my sister if she had poured it out, and she said no. Then her fiance pipes up and says "Oh, I drank that." Of course we start giggling to ourselves, and he asks if we had done something to it. We said no, and he said that it smelled like SANGRIA! We three girls just burst out laughing and then he digs himself even deeper, admitting that he had drunk straight from the bottle, just like I had, not long before.