jedibuttercup

Have you ever considered crossing this plotline over with the one you wrote where Xander finds out he's actually a Sidle? A bit unlikely, I know, but they did an episode of "CSI" once a few years ago where the several cases that the CSI's were investigating at the time turned out be tangentially interrelated via the people involved in the cases; Grissom even used string theory to explain that everything and everyone are connected at the end of the episode. So Sarah's biological brother (Xander) meeting Grissom's biological daughter (Buffy) isn't that unlikely, especially since the two were both both in California.