Freud coined and promoted GSA or genetic sexual attraction to explain sexual attraction within families. Basically the theory says that we are sexually attracted to similarities, people who are like us, so that theory explains the high levels of incest within some cultures.

Freud often referenced Oedipus, but Oedipus didn't know his mother was his mother when they had their sexual encounter. So they were genetically related but did not have an established parent-child bond.

Today, a lot of thought around GSA is considered pseudoscience by mainstream science, mostly because instances of GSA are situations where familial familiarity is not in play, like Oedipus. Or, there is some sort of force or coercion going on (think of how monarchies are all related). Or some other influence or sexual condition coming into play.

The other side of the coin is what a Finnish anthropologist, Edvard Westermarck described as the reverse sexual imprinting. Wikipedia has a good entry on the https://en.m.wikipedia.org/wiki/Westermarck_effect. Basically it says that sexual attraction is desensitized amongst siblings who have been together from the age of 6 or earlier because they become accustomed to each others bodies. But it generally applies to parents too.

Let's face it, if GSA was indeed the overriding factor it would be the norm for siblings and parents to mate with each other and we would see much higher incidences of that regardless of how taboo culture tried to make the practice. Who else is going to be more like you than your family? Parents could groom the perfect mate from their own offspring.

But that thought is revolting to us, right?

Clearly, something else defuses, overrides, or stymies GSA when people live together as families. In blended families, it is uncommon for step siblings or step parents/step children to be sexually attracted to each other and when it happens, most people regard it with the same level of disgust. Can we clearly say that's simply cultural when blended families are a more recent phenomenon, large scale?

So, it makes sense that women would lose sexual interest in mates they find themselves parenting or having to direct. They start to think of them as another child.

This weaponized helplessness to get out of adulting or further game the marriage contract that men do is cutting their noses off to spite their face. They're diminishing their own sex life by acting like children instead of partners.