Responses

You're right. If the uke had been this clingy in the beginning, seme would have been completely intolerant of it, being the asshole that he was in the beginning. I think the fact that seme has now done a complete 180 out of nowhere seems completely off left field as well. It felt so sudden and unnatural its giving me whiplash.
Uke is passive, but comes off as enabling the childish behavior. Either way, if he was really upset by it a clear line needs to be drawn. The seme is super aggressive and not in a cute way either, and uke is bound to just be swept in the current of his behavior.