There was a post on this 2 months ago, but the OP has deleted it, so I'll make my own post on it.

https://ifstudies.org/blog/liberal-and-conservative-women-have-very-different-views-about-marital-infidelity

Although the article comes from Ifstudies (which has a mixed reputation due to its conservative bias), the research they cited comes from the Survey Center On American Life, an organization as trusted and credible as PewResearch.

Previous surveys that asked Americans to weigh the morality of certain behaviors either did not specify the gender of the subject in the question or, as is the case with Gallup’s question, mentioned both men and women. We developed a novel approach that asked respondents to respond to a question that explicitly references gender. As we explain in our report, “half of the sample were asked to judge the morality of these behaviors when a man engaged and an identical number of respondents when a woman committed these acts.”

It turns out that Americans react to infidelity differently for men and women. The gap is particularly large among women: 70% of women say that it is “always” morally wrong when a man has an extramarital affair, but fewer (56%) say the same when it is a woman who has an affair. (Nearly 1 in 4 women say it is morally wrong “most of the time.”)

This moral double standard varies among women from different backgrounds, but the gap is particularly large among liberal women. Only 36% of liberal women say it is always wrong for a woman to engage in an extramarital affair, while 57% say the same for men. Conservative women, by contrast, are somewhat less likely to judge men and women differently for committing infidelity—71% say it is always wrong for a woman to engage in an extramarital affair.