Would their secret be safe with you?

SO my 13 year old niece came out to me as bi-sexual recently. Of course her secret is safe with me and I have not had the desire to tell anyone, but I do wonder what made her tell me. She told me that she was playing at first , but this was because she didn't know if she could trust me or not, but she then brought it back up and said that she is in fact bi-sexual which I kind of figured anyway for a long time. I am comfortable posting here because nobody knows I'm on this site that I actually know.

What would you have done in this situation if the shoe was on your foot? Has it happened to you?