Like I said man, it has to fit the moment. The threesome where MC fucks Sandra while she licks Alice is a ginger moment where Sandra wanted to show Alice who is the boss because she was getting too cocky. In the sense of "MC's dick is mine, you will only get the tongue treatment and maybe I'll let you suck the cum out of me." It was a "heat of the moment" thing. The threesome with Fiona and Becca? Different thing.
I'm not gonna say "Fuck you man, I'm not gonna make anything optional." But like I said, it has to fit the moment.
I like that angle a little bit more, but you have to admit: there interactions up to this point make that angle completely unlikely. Sandra is a sweet honey bun, that "boss bitch" treatment is weird coming from her. Specially "MC's dick is mine", when she's the one pushing for him to fuck other people.
I dont want to get to personal in here, but this is how it started with me. Ex-gf thought the whole "polyamorous" thing was cute, and it started with some messing around with one of her musical group friends (college music group, all female). Then I was the odd one out. Then I'm the one she breaks up with and her friend is the new gf.
It starts simple, messing around, "wholesome", but it doesnt stay like that. I'm sorry for all of this. Love your game, love Sandra and the gingers.
EDIT: I'll just pretend it didnt happen, have this literal heart ache and tachycardia for a few days everytime I remember it and maybe it wont happen again and I'll forget about it.)