If you want, report the auction.

But just so you know, anyone can take a picture of you and post it in an auction for something. None of you know my eBay name. Who's to say someone can't get a picture of me or Kia and post something horribly cruel masqurading as me.

Also, I share an eBay account with my sister.

It could be possible that is the case and they mirrored how she posts her true auctions just to get a laugh.

Or if she's truely bi-polar, then hey, what can you do? Report the auction.

Email her even and ask what is up. But don't jump to conclusions.