I pick my belly button

Not pick, but, hot older sister has a habit of lifting her shirt up and scratching her bare tummy and navel, using her long nails to dig into both for seconds at a time. Seeing her poke and probe her deep, oval innie, without really noticing she's doing it, is an incredible tease. Can't ask her to do it, just need to wait for it.

We were at a holiday gathering, and I joined her to chat in a finished basement while she smoked. Up came her sweater, to mid-ribs, and while she puffed and held her cig with one hand, scratched and traversed her tanned, tight midsection with the other. My eyes were glued to her body.

as long as you don't do it in front of other people