If one of the girls wanted to move one, I truly think MC'd be ok with it, the not sharing with guys was brought up in context of direct sharing by the girls, it's not like he said you are mine now, only my dick EVER again, maybe some pussy if I let you, he's not that guy, and the girls have stated they do not want other guys, so I think you might be over thinking this, just like you are in MNF dude.
I am glad you like the game, but Devs are going to do what ever they want with THEIR story, it's up to us as players if we want to follow their story view or not. I am not trying to bash your opinion, you have every right to feel whatever way you want, I am just saying you are at the mercy of the Dev if you want to continue with the game!