Just because you want "a little bit of confirmation" doesn't mean it has to be in the game, though, since you are literally the first person who interprets it like that - with your head canon, at least. Like I said, it doesn't always have to be said like that, I think it's pretty obvious they never did anything else like that before and after that again. If you think differently, that's fine, but it's not what is portrayed in the game - even without the explicit "We never did something again!" from either of them ( which would feel even more out of place ).