When we broke up she was a virgin now we’re back together and she’s a slut

My girlfriend and I dated since we were 15 and broke up about 6 months ago. We were both waiting for marriage at the time to have sex but the breakup was bad and she ended up losing her virginity that night to a random guy. We’ve recently started talking again and she’s letting me go down on her all the time now but she’s had all this sexual experiences that I don’t. During the 6 months she went through a phase and uhh you could say had a lot of fun. Now she wants to get back together and is saying none of that ever even mattered and we can still wait until marriage. It’s very different now that we’re getting back together and she has all this sexual experiences on me. She wants to keep it this way where she can still keep sleeping with other guys while we’re dating because it’s just sex and not actually dating like we are. Gonna take a ton of adjusting but I’m getting used to the kind of new relationship we have