I'm now pretty sure that Tsuna will DENY BEING BOSS until the day he DIES because he just doesn't want Reborn to leave ever, so Reborn is eventually just going to drag him to Italy in a sack no matter what he says.
Pretty much. Tsuna is now officially up to three wives - Haru, Kyoko, and Reborn.

KHR did get pretty bleak, in its own way, especially with the Future Arc. Amano might yet produce something along Gen Urobochi-like lines...?