Kakashi raised an eyebrow, that same twitch of a smile staying resolutely where it was as he gave Yamato a side-on glance.

"Ah, some people just lack the will, I suppose.. Or lack of it."

He stretched out his arm, reaching across Yamato's lap to retrieve his own cup and stealing a soft kiss against the man's temple before he settled beside him to nurture the heat of hot water for himself.

"I wouldn't want to disrupt his usual training regime. I can stay a little longer."