How Do I Find Out The Sites My GF Was On?

[gottafindout!]

I've been dating a girl for about a year now, pretty hot and kinky. She told me she did a couple BDSM sites and some other porn several years back. She won't tell me what sites she was on and I've been looking for a while now, but there is so much porn our there. I'm dying to see her shoots cause she is so sexy and I would love to check it out, especially when she was in her early 20's. Anyone have any suggestions???

Thanks!!!