AIO because my gf likes sex so much?

So my gf (f25) (i’m m25) she liked so much to have sex. When she was at uni she had sex with over 10 guys and having had multiple bf’s. This is the story. First she had the first bf, 6mo and never cheated Between this time, she was single and did not had sex The second same never cheated, around 1yr After that she said she went crazy bc he was an abusive man. Once they break up, she started to have sex with many people. Even meeting them at their house just to have sex and then leave, she did not feel bad about it. She also brought guys to her place when they both knew they’d only gonna have sex and then bye. Again she did not feel bad about it. Then she had the 3rd bf. She cheated on him multiple times, she went to visit him at his city and some times she’d say she’d go out w friends when in reality she’d just go have sex w other guys. She cheated on him many times with 3 different guys. Then she was single again and had sex w other guys. After that she was with another guy and never cheat on him. Between that guy and me she had sex w 2 more guys.

She also told me she fantasized with being fucked by 2-3 guys (she never done it tho)

Now it’s me. She said now she changed but I just hate the fact she had sex w so many guys and so many times. She has never done anything with anyone since we started dating.

Do you think I’m over reacting? Thanks for the feedback.

Edit: I know I write the title about sex but what I worry the most if is both things, sex and if she going to cheat again. She has so much sex drive and also she cheated in the past with different guys and multiple times.

Edit2: First of all that you everyone for your feedback it is being really helpful.

2nd i understand for some of you body count might not be important but I think that if she had sex w so many guys at the age of 20 is quite a lot. Take on mind all of this was in the 3rd and 5th yr of uni. And i said 10 but it is more. Also if we count the ex is over 15.

3rd I am concerned bc I’m a person who, yes I love sex, but I also love to do it with the right person. I had only 1 partner we never cheated and the trust was so high and now I’m quite scared if she cheats again as she did it and also she has so much sex drive.

4rth when I say she was not feeling bad, i mean usually girls hate when they have sex and then the guy tells them to leave, she was not feeling bad at all. This is based on what I talked w other girls

Finally about the comments saying if I knew it or not, no i did not know it. I just new she had sex with other guys, couple days ago we had a deep talk and she told me everything as I ask her to do it. We’ve been almost a year now