Trust isn't easily earned, as the girls of Pretty Little Liars can attest.

On the August 21 episode of the hit ABC Family series, Spencer Hastings (Troian Bellisario) discovers Paige McCullers (Lindsey Shaw) may have ulterior motives for dating her BFF Emily Fields (Shay Mitchell).

During a conversation with Cece Drake (Vanessa Ray), Spencer is shocked to discover that their deceased pal Alison DiLaurentis (Sasha Pieterse) was secretly feuding with Paige. "That is seriously so messed up," Cece says when she sees Emily and Paige arriving at school. "If Alison were alive to see Emily cuddling pigskin. . ."

"I'm sorry, who's pigskin?" Spencer asks.

"Her!" Cece says, pointing to Paige. "Alison and that wench had it out for each other."

Pretty Little Liars airs Tuesdays at 8 p.m. EST on ABC Family.