He doesn't show his relief. Gabriel's learned, over time, that even as much as Kaylee seems to distrust certain social behaviors from the Core-- they still seem to work very well. Much better, unfortunately, than his attempts to be open and familial had, before.

Besides, he's still reeling over something else she's just said.

A year and a half? But that's--

Quietly, Gabriel gives inward thanks for the place called Milliways once more, and says easily,

"I can see how that would be; it's never comfortable to change from something that's familiar."