I started dating my current bf in college... And I knew he'd had girlfriends and sex before, but it didn't bug me at all, it was sort of like "yep, that's what people do... I might be a virgin and he not but that's good, becuse then at least one of us knows what we're doing!"
i didn't bleed at all during my first time, and it didn't hurt bad either.
We'd had sex about nine times (not all at once, lol) when he told me that now, he'd had more sex with me than all of his previous girlfriends combined! That made me feel so good.
Don't fret about her previous boyfriends. They are "previous", remember? She's with you
now. That's what mtters. Just play it safe, use protection, etc, bla bla. I don't wanna see you or her on the pregnancy or abortion forum!