i'm not the culprit. anyway, it's up to you to believe or not.

firstly, my friend's gf is his gf, not my friend. just 'hi &
bye' whenever i meet her.
2ndly, she didn't ask me. my friend asked me.
3rdly, i don't ask about my friends' sexual life(or the usage of
condoms).
4th, i do not know whether it is true or not. just knew it over the
phone less than 1 hour ago.