This is really weird. I could have sworn I read an entirely different ending to this manga where all the characters had been locked up in a cold storage prison and released by Kenzaki.
So what is the other thing she's thinking of that they haven't done yet? Accidentally walking in on someone while changing? I really can't think of anything else.
This is a misunderstanding I can get behind.
Edit: Also, she's not entirely wrong. Kaede did squish her boobs against him but it was through the covers... and the lips touching was a bit more at the forefront of her mind.