<human>: Can you condense the text into three sentences or less?

Me (25/m) met this great girl (23) about six weeks ago. We've been hanging out basically every day for a month and I am developing a really heavy crush on her. She is smart, good looking, and the sex is great. 

However she came out of a 2 years long relationship that ended about 6 months ago, and has since then been planning a trip involving two music festivals with her girlfriends. Fine by me, I can't really keep her from going. When she mentioned it I immediately thought she would be with other guys (she hasn't really had a chance to fuck around, so I kinda get that), then I thought that this was classical male-jealousy, and that I should stfu about and play it by ear. After all, being a jealous asshole wihtout any solid basis for my accusations, would surely ruin my chances with her. 

Thing is though, before she leaves she basically implies that she can't be "faithful" while away while also mentioning that she wants to have "the talk" when she gets back. I kind of said ok, I understand. Thing is, I don't. 

I could've handled the suspicion of infidelity by blaming my own jealousy and insecurity, but she basically told me she would be a "total slut" while away. Her words, not mine. 

This bothers me to no end. I can't decide on what I should do, or even what to say when she comes back. All this uncertainty and doubt is killing me and my feelings for her, but at the same time she's a great girl and the only one I've fallen in love with in a very long time. 

I'm not sure I want to start of a relationship with a girl that plans on sleeping around before committing. We're very progressive in other aspects, so calling people out on being promiscuous doesn't really fly - even though this is in fact what bothers me.
<bot>: About to commence a relationship - girl goes out of town saying she will sleep around, probably wants a relationship later. Trust issues.