The shift is not as subtle as it could be; the way Vincent's manner changes. He's calm but as Cloud speaks again there's probably an undercurrent that causes him to focus. Something which becomes more intense and brow furrows. There's a way the visible muscles shift that suggest the tall gunman's lips have pressed into a line.

"Who else knows?" He'll handle the idea that it was kept around, that Sephiroth had given it as a birthday gift and the months that implied later. Right now one thing at a time.