It's kind of like a Chinese finger trap. The more you push, the more likely she will end up in the arms of one of these guys. But, if you relax and make your partner feel relaxed (by satisfying her emotional and sexual needs), then you'll be out of the trap and no worries.
It also takes some time and experience to be more accepting of other people's free will choices. I'm not sure if this comes with age or what. But, eventually you hit a point in your life where you're like, "Hey, I'm the best man around. If she ends up sleeping with one of these guys, I can't force or control her or the situation, that's just how it is. And if it happens, I'll move on easily and find a woman 10 times better that will never cheat on me and wants me uncontrollably."
Basically, just don't bring it up with her and act like it's no big deal. And when she talks about her orbiters, just pay attention in the back of your mind that she just thinks of them as friends or brothers. Bottom line is that you're not going to be able to force a girl to drop her guy friends (well, in some circumstances you can, but it's going to leave her with resentment towards you).
I actually have a female friend that broke up with a guy because he was trying to force her to stop talking to me and a few other guys, and I didn't/don't have any sexual interest in her. He got labeled as a "control freak" and broke up. Sometimes it can all be in your head. She's having sex with you? She's spending MOST of her time with you? Then don't worry about it.
I've also known of the opposite happening where the girl did drop all of her guy friends, but it's usually because she's either (a) desperate [due to age or lack of beauty or something else] or (b) she views the guy as having much higher status than herself [celebrity, gives her amazing sex where she just can't say no, low self-esteem, etc.]. And, when all is said and done, she STILL may keep some or all of her guy friends, but now she'll just make it a secret (which I think is a worst situation to be in).
Lastly, let's say she does have a bunch of orbiters. End game.... you eventually get married one day, move far away from all of her orbiters (new country? suburban-land with no singles?), have kids that eat up all of your time, game over.
