Seamus recognized the serious tone, which was not unusual for David. But... to be entirely honest, Seamus got a bit of a butterfly bounce in his stomach at the prospect of finally being let in on the secret. The secret that, lets face it, the wizard already kind of knew he just hadn't pried too much into the details to get a confirmation.
When the words were spoken, Seamus inhaled a deep breath and then leaned into the table. His beer still in hand.... "Yeah..." he nodded, "I sort of figured you were either an uncle or.... something else a bit more serious." His tone was calm and unthreatening. "But you know.... I shouldn't be the one you're telling."