I've apparently been playing some practical joke on one of my sisters (though not familiar as any of my real-life sisters), in which I have been secretly removing buttons from her clothing over time. I think it'll reach a point where she'll be like "why do all my buttons keep disappearing?" and I'll give her back all the buttons, and it'll be really funny. But she doesn't seem to be noticing, and it's getting to where her clothes aren't holding together properly and sometimes she exposes herself through the gaps in the front, so I'm thinking I'd better give up the joke.

We're in a car, and somebody in the front passenger seat (Steve, perhaps) says something, and I hint something about all the buttons, and attempt to reveal my secret by opening my hand to reveal all the buttons, but there aren't any there. It's just loose change.