This kind of thinking is stressing you out unnecessarily. Think like a Samurai warrior. To survive in battle, think that you're already dead. The only thing that matters is you and your sword. That's how you survive death and slay as many pussies as you can.
To answer your question, based on my experiences, yes. But of course, all girls are not the same. There's this fuck buddy of mine at the office who just got married for 2 weeks or so. She kept on rubbing her breast at my elbow so I ended up rubbing my dick on her ass. Eventually, we ended up banging for several hours in the office. She later narrated how her honeymoon sucked because her husband was not good in bed. I was the guy who took away her virginity.
That's just one example. There's more but that one is the worst so far.
The point is, the only thing that you should be concerned about is you and your sword (cock). Assume that your gf has fucked every Tom, Dick and Harry that she has grabbed asses with. Now, your job is to fuck her brains out every time and keep on improving yourself instead of allowing your mindset to deteriorate into this needy vibe. That's the only way you'll get inner peace and keep her loyal and committed to you.
She has a pussy as much as you have a cock. She's human. She isn't an artificial Jenny Jameson pussy with 100% genuine latex that feels like human vagina handcrafted by beautiful virgin Chinese factory girls that you can lock in your closet so she doesn't get the urge to try other cocks. How much time without you does she need to fuck around? A 3-minute quickie with a stranger rarely leads to orgasm. The rule of thumb is 20 minutes foreplay and 20 minutes banging. One hour is her window of opportunity to fuck around. You can't be watching her 24 hours a day.
As long as you're giving her the dopamine excitement from passion and sexual intercourse and giving her lots of oxytocin release from multiple orgasms so she's calm and contented, she'll stick with you like mozarella cheese sticks on pizza.
So what if she fucked 30 guys before you two were officially on? What matters is the here and now. If you keep on thinking did she fuck 30 guys or not before you two were officially on, then that pressure's going to explode sooner than later. Assume that she fucked every man on sight and you'll feel better and okay.

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Approach. Open. Escalate. Isolate
Here are my two essential rules on texting that will save you tons of time and money:
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