The Fosters season 3 episode
Callie and AJ in The Fosters season 3 episode 6 promotional picturesABC

The Fosters season 3 episode 6 will find Callie celebrating her 17th birthday, amidst plenty of drama at the party.

The episode is titled, It's My Party, which will air on Monday, 13 July at 8pm EST on ABC Family.

The official synopsis of the upcoming episode reads as follows:

Callie thinks she's celebrating her 17th birthday with just the family, but Jude surprises her with a house party. Jude's surprise risks exposing both Callie's and Mariana's secrets when he innocently invites Rafael and Wyatt to attend. Meanwhile, Brandon's suspicions about AJ's behavior come to a head, and Mariana and Callie decide to buy a car together without telling their moms.

Meanwhile, in the latest promo of the show Jude is heard shouting "Surprise!" to Callie as the family gathers to celebrate her special day.

The voice over announces, "The celebration takes a turn for the worse," as we see a glimpse of Callie kissing AJ, and Brandon and the new Foster kid fighting are seen at the party.

We are aware that Brandon doesn't approve of Callie and AJ's romance and has been vocal about his disapproval in the previous episodes.

The video then shows Mariana talking to Wyatt, which follows with the words, "A secret is finally revealed."

"Mariana and I hooked up," Wyatt tells Callie to what a shocked Callie questions, "What do you mean you hooked up."

In the last episode, Mariana came clean on having sex with Callie's ex boyfriend Wyatt and told her mothers Stef and Lena about it.

How will Callie react to Wyatt and Mariana's secret? With all the drama happening at her birthday party, will she actually be happy at the celebrations?

To find out, watch The Fosters episode 6 that airs on Monday at 8pm.

Here's the official preview for Monday's ALL NEW episode of The Fosters! A secret is finally revealed and a celebration takes a turn for the worse. Don't miss it Monday at 8pm|7c on ABC Family!

Posted by The Fosters on Monday, 6 July 2015