'Glee': Quinn And Santana Slap Each Other, Marley Collapses At Sectionals (VIDEO)

Absence makes the heart grow fonder, but it doesn't forget. After a heartwarming reunion at McKinley High, Santana and Quinn picked up fighting once again on "Glee." This time, though, they were doing it on behalf of the new glee club members they were mentoring -- though the violent slap was certainly unexpected.

But while Quinn was being protective of Kitty, Santana was right to be concerned. She'd found laxatives in Marley's bag. Quinn didn't know the other side of the story, and Kitty was continuing to web a weave of lies and manipulation.

Ever since the musical, Kitty had been in Marley's ear, convincing her that she was gaining weight and destined to wind up the same size as her obese mother. Only, Marley is waif thin already. Still, she's been taking Kitty's advice and purging what little she has been eating.

She was in no shape for the club's energetic take on "Gangnam Style" at Sectionals, collapsing as the number came to a close. Could this end the glee club's streak of Sectional wins? Fans will have to tune in next week to find out.

They can also look forward to that heart-to-heart between Blaine and Kurt at Christmas, as the broken couple seem destined to see if they can get past Blaine's cheating. Find out as "Glee" continues, Thursdays at 9 p.m. ET on Fox.

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