She's probably lying, but I'm of the opinion that nearly every girl that has a sexual past will lie somewhat about it. Don't feel bad, my first gf had given 5 guys blowjobs before me and she was only 14. She has been married now for 16 years and is doing great, but she was a little slut back then, cheated on her boyfriends and lied to me about her sexual past from the getgo. I'd much have rather had her be honest about it. It still bothered the shit out of me back then. Now, I wouldn't care.