I have a sneaking suspicion ...

Question: I have a sneaking suspicion (spoiler alert) that the McSlutty girl who hit on Derek at the bar is Meredith's half sister.Answer: You're not the only one.

Michael Ausiello

May 16, 2007 at 1:00 a.m. PT

Question: I have a sneaking suspicion (spoiler alert) that the McSlutty girl who hit on Derek at the bar is Meredith's half sister.

Answer: You're not the only one.