Well, now the apparently unconcealable partying finally makes sense.

They grab Kaarina in da club and say, "How'd you like to be Prime Ministeress? Everything will be comped. All you gotta do is change your name and keep your mouth shut."

THOTs being THOTs, she signs on immediately, and everything goes swimmingly for a while. THOTs being THOTs, she says to herself, "This is some real boring BS they forgot to tell me about. This guy ain't my husband, and this kid ain't my kid. A head of state has needs and I'm gonna live my best life. They can worry about the mess. What're they gonna do, fire me?"

This is another example of the principle that, if something doesn't seem to make sense it's because you lack information. Everything in the world has a reason when you know enough about it.