Credit: Video Still

On Grey's Anatomy Season 9, Episode 8: “Love Turns You Upside Down” we met yet another one of Derek's (Patrick Dempsey) sisters, Liz (Never Campbell). Now, in a new sneak peek of Season 9, Episode 9: “Run, Baby, Run” (December 13) we get a better sense of what she's like.

In this clip from the episode, Liz berates Meredith (Ellen Pompeo) (and, implicitly, Derek) for failing in her familial duties. She's disappointed that she and her sisters haven't even been invited to meet Zola yet, which is actually pretty fair. Sure, Derek has a complicated relationship with his family, but we can see why his sisters would at least want to meet their niece.

Will Mer be able to make amends?

Credit: ABC © 2012 Disney ABC Television Group via YouTube Photo: Preview Clip of Grey's Anatomy Season 9, Episode 9: Derek's Sister Takes a Stand (VIDEO)

For more Grey’s spoilers, click here.

Catch the next new episode of Grey’s Anatomy on Thursday, December 13 at 9 p.m. ET/PT on ABC.

Rebecca Martin is an editor at Wetpaint Entertainment. Follow her on Twitter @BeccaDMartin.

Satisfy your Grey’s Anatomy addiction: Like us on Facebook and Follow us on Twitter and Tumblr.