Seems K&K's relationship, strangely enough, will advance because of this. Kousuke will be forced to put into words, at least in part, his doings with Koto and won't be able to run from it, and Koto will be given the "abnormal" justification of their tryst to compel her further into it, to spite her shitty mom (though if she's gotta have that validated by strangers it ain't looking too good for her smarts).
At least I hope so. If things are going to come tumbling down, it better be for a real goddamn reason.