OMG, wtf is wrong with people?!! do they lose their minds when they travel?
I would try to get her to pay for it, so you can avoid the pain of ABB "customer service", and hopefully you got her confession in the messages, and not verbally.
I have a cute sign on all my toilets about not flushing the wrong things.... but seriously, who needs to tell someone not to flush a giant, odd-shaped bone?! When you look back at this, once you've been reimbursed, it will be funny, cos that title made me giggle, i imagined us making artwork with all the kooky "guest did~~~" topics.