Flatmate is cheating on her boyfriend

She gets into relationships and brings guys back, it's funny, she says she tried to kill herself etc. ~(more than once, so it's obviously BS, also she says she self harms, but i saw 0 marks on her) because she didn't know which one she likes. (this was a year ago, same story now though, different faces)

For secret santa what do you think is a funny thing to get her? Femdoms? A cheesy novel about dealing with emotions.

Suggestions appreciated.