Nope - it's not betraying their trust since both would be fine with it.
I mean obviouly the autor want some tension. we will have some chapter with the Wives being mad but accepting it because friendship, familly and stuffbut her sudden return will likely generate some tension.
Exactly !This douche is just doing whatever he pleases.
She is clearly against it. But since this IS a manga about HAREM it needs for them to be okay with it. we will have same drama chapter about it abviously but the end game she will be backYou can ALMOST see her holding herself back from a giant freak out