Episode 6 of "The Fosters" Season 3 ended on a bit of a cliffhanger for A.J. (Todd Williamson) and Callie (Maia Mitchell). While Callie was telling A.J. about her Mexico adventure with Brandon (David Lambert), A.J. started to make a move, but Callie stopped him. They agreed to wait until A.J. officially lived with Mike (Danny Nucci) before they would let anything happen. However, would they be able to stick to that plan in episode 6, "It's My Party?"

According to the synopsis for the new episode, Jude (Hayden Byerly) decides to throw a surprise 17th birthday party for Callie, but the celebration might cause more drama than he planned. Plus, Callie and Mariana will apparently buy a car without telling Stef (Teri Polo) and Lena (Sherri Saum) -- probably a bad idea. On top of that, the synopsis also teases that Brandon discovers something about A.J. that sets him off, but what could it be?

The promo for episode 6 might have the answer. In the sneak peek video, Callie and A.J. share a kiss! Brandon has already expressed some reservations to Callie about her and A.J. getting together and later in the the teaser Brandon and A.J. are shown fighting. Could the kiss be the thing that triggers the scuffle? 

Callie has bigger problems, though. The promo also reveals that Wyatt (Alex Saxon) makes an appearance at the party and he has a confession for Callie. The teaser shows him telling her that he slept with Mariana (Cierra Ramirez) and Callie does not look happy about the news!

Watch the promo for Season 3, episode 6 below:

What will Callie do when she learns about Wyatt and Mariana? Why are A.J. and Brandon fighting? Fans will have to wait to find out. "The Fosters" airs Mondays at 8 p.m. EDT on ABC Family.