That may have been the case 50-60 years ago, when women could be ostracised by family, friends and society for daring to cheat on their husbands. Back then a woman's rights within her marriage was a big feminist issue. But nowadays it's so common, it's no longer such a big deal. Most people ( men included) accept that it's a woman's right, to choose her own destiny within a marriage or partnership, if that's what she wants to do. If you cheat you obviously run the risk of ending your marriage or relationship, but nobody today would seriously try to argue that a woman has less right to cheat on her partner, than a man ( which was still the case 50-60 years ago). Unless they're a faceless individual behind a keyboard of course. Feminists have long since moved on to other more pressing issues, like sexual harassment, domestic violence and the pay gap between men and women.
If it was still the case, where women were much less likely to cheat than men in relationships, then you'd be right about it being everything to do with feminism. But the latest US statistics, show that in couples under 40, the likelihood of one spouse cheating on the other, was pretty much equal between men and women. It's only in the the over 40 age group, where Men are still much more likely to cheat. And since Adrianne and Oliver, are still a young couple, your interpretation just doesn't apply to them.