Somehow this thread fell out of my notifications list... I hadn't stopped by for a while cuz I traveled and maybe missed it in the 100 notifications I got. It's funny how people get all these feelings of jealously as I've purposefully avoided LTRs my whole life and if I ever got into one it'd have to be non-exclusive... and not in that douche-y way some guys do where they really mean they just want to fuck around and have the girl be faithful, I mean actually non-exclusive.
My previous LTR and I joked in our first years together that we'd have to start dating others in order to retain our Polyamory membership card.

My very first relationship was part of a MFM "v" relationship. That probably helped shape my own attitude about "sharing."
It's interesting how people can feel that even in platonic relationships (maybe parent child is different, but if my parents ever got separated and new partners I wouldn't care as I don't much like one of them won't say which, lol). But like with all the incest games where it's a pervy brother and they hate all their sisters' boyfriends, I can't relate, I've been friends with all my sisters' serious boyfriends... I think it's cuz I associate monogamy with religion and the invention of patriarchal land ownership as a concept among humans, because we didn't evolve to be monogamous and that's obvious from the rate of cheating/divorces in most countries, and the lack of monogamy in a lot of extant tribes that have matriarchal systems or don't practice exclusive land ownership...
The point being I've associated monogamy/monoandry with religion and patriarchal property laws from a broader anthropological context since I was in like high school, and the dudes all over the internet, here included who scream "cuck" and "no NTR!!!1!111!" just reinforce that for me, so it's interesting seeing coherent explanations of that sort of jealously in the context of consuming a porn game with detailed, reasoned explanations from multiple genders...
Because my sister was five years younger, I really didn't have much interaction with her boyfriends, just her husband, and he wasn't very sociable with family.
Since these games treat sisters as LIs, more apropos would be my girlfriends' boyfriends, in the case of pre-existing relationships, I felt it was important to be friends with them, in the case of new boyfriends, I usually encouraged their exploration. So I expect even if I was a "pervy brother," I'd still not hate my sister's boyfriends without cause.
Definitely, there's a lot of misogyny in the historic institution of marriage. People often like to point out that we are more closely related to bonobo chimpanzees than Pan. Regarding religious aspects, one reason I walked away from the RCC at 13 was the official attitude toward women ("the only way to grace for a woman was through a man" Blech).
I also hadn't really been thinking about the office ladies from a gorgons/fates/sirens perpective, pick your poison, so that's a good observation from
Dragon59 or whoever noted it originally.
I looked at them as a rather kinky Triple Goddess, Maiden/Mother/Crone. These other triples are pretty good as well.
I think you're also misunderstanding what I'm saying... I'm kind of referencing the platonic jealousy
Miðgarðsormr brought up, which is an interesting sentiment that I've never really thought too deeply about, even though I'm aware of it; and extrapolating it a bit to the 3 office workers in the way his family viewed them; and also separately referencing the more primal polygnynous jealousy a lot of people express on a different level and sort of musing on the origins of those feelings... I probably didn't do a good job in expressing those two concepts as separate, even though I subscribe to a Freudian view of the psychological nature of attraction and brain development (in the evolutionary biological sense of the brain extrapolating those processes in the evolution of the prolonged neotenic state of homo sapiens, not the facile, puerile way it's used in pop culture) but then that gets into a long discussion and I just wanted to make my point as quickly as possible...
You understand the -andry and -gyny suffixes!
Sauce for the goose, sauce for the gander.
I do like the incest games BTW but all the people who scream about cucking stuff also prevent stuff like MM group sex + incest games which I also like from being more popular lol... And then when people who make that content stop making it even though there's an audience for it that really grinds my gears... but that's neither here nor there in in this thread.
I only know personally of one incestuous family. The family of a friend of a partner's friend. The kids were very close in age, and when they were young and curious, they mutually experimented. The mother decided not to stigmatize it and it's just something they did when they were younger. It did not get in the way of finding partners later in life. No apparent PTSD about it. I think because there was no power dynamics, the biggest individual danger. That's one thing NR is working hard to avoid--the father/patron is not trying to use his status to corrupt/break the girls.
I've never had incestual thoughts about my mother, or daughter (a little for a step cousin who'd been added to the family in our teens). To me, the incest plotlines are just a way to increase tension and move the story along. I've long felt that the step-incest trend in modern porn is more about how to skimp on sets and story--you don't have to explain why so much of the story takes place in a single house, or deal with getting the people to know each other. That said, LoML seems to break away from the usual fare, in that the characters actually have a back story and they aren't rushing to bed as a shortcut.
Since I've never actually had a FMF threesome with me in the center, I like to fantasize about those, but since my common experiences have been MFM with my partner in the center, I wouldn't mind them for a bit of familiar reality.