Answer is complicated as with most things.
Everyone knows women practice hypergamy. Everyone knows that. The evidence is overwhelming. But do they practice it exclusively? No.
Women practice hypergamy and then they don’t practice hypergamy, that is they practice monogamy. I’ve had women in love with me, and I gave them freedom to date other men and they said, “I don’t want to date other men! I only want you!” And that wasn’t just once, either. That were a number of women who said that.
Pretty sure my Mom was faithful to my Dad for 50 years.
Women are completely contradictory creatures. Are women nymphos or prudes? Good question. The truth, oddly enough, is that they are both, often at the same time! Being prudish and being nymphomaniacs are both essential aspects of the Female Character. I know it doesn’t make sense but that’s just how they are. And once you figure out this ambivalent weirdness, a lot of things about women will start to click and make sense.