Wow

Hey, let's be fair now, just for a minute. They were married off - most likely against their will - and their whole life revolves around the Prince. They are probably hounded by their parents as well - "Make him favor you so that I will gain status along with you, you useless girl."

A harem (a real one) is no joke to the women stuck in it. They all compete with each other, back-stab each other, have nothing to do but worry about their status. Why should they all have genuine feelings for the Prince?