I believe obsessing over womens' sexual history is unhealthy, and that it's not red/black pilled at all to do so but rather a twisted remnant of blue pill idealism. I expect almost any guy reading that to deny it outwardly because that what you're supposed to do, but feel it's true within...
It's not that you should "accept who she is" but rather that idealizing her at all is unhealthy. Added on to that, I don't think it's sustainable to obsess over it either anyway because women can and do have loads of sex with loads of men and the only way to avoid that is to create hellhole societies like Afghanistan. You'll have lives of paranoia, obsession, totalitarian oppressive control... fvck that. That's not love anyway. I always had this perspective bubbling in my mind, but lately it has become undeniable that this is the way I really feel about it. When I'm actually standing there talking to a woman in real life.... I really don't feel like I give a shyt. If you have no idealism weighing you down, why would you? and I can say it feels very freeing to let go of that weight, you are the one whose peace and contentment is the worst affected by it.
Are your aims and habits compatible? can she pair bond healthily? does she respect you? does she desire you? do you enjoy being with her? Yes/no to those 5 and you're good to go. Relax and let go of needless unhealthy blue pill idealism that just hinders people from being able to find contentment in reality.