Alright here we go *prepare for rant*.
Now first off, I do not know crap1 about the bible, so take what I say with a grain of salt. But I fail to have ever heard the 8th deadly sin is homosexuality, but people act like homosexuality is as bad as murdering half the planet. And anyway, isn't there that thing, "hate the sin, love the sinner" if it really bothers someone that much. Also, people can be who the heck they want, you can't change them. Everyone is entitled to their own opinions and thoughts about oneself. Plus, imagine it was a world where everyone was mostly gay and straight people were discriminated. Also, why would it be that bad? How is liking the same gender bad? Either way unless you are asexual you like some people in that way, whether you are gay, straight, bisexual, pansexual, whatever. How is it honestly any different? Hm? I think it is worse to hate someone for something they can't control rather than liking the same gender.
Now that that rant is over. Tell her it isn't right to say stuff like that, if she gets suspicious, just say it is prejudice against people and it is not right to talk about them like that.
1C.R.A.P is not a bad word, it was on disney!