Callie is letting out all her dirty laundry to her moms when The Fosters returns.

On Tuesday, a sneak peek of the Season 4 premiere episode was released that shows what happens following the last scene when Callie told Stef and Lena about how it's true that she slept with Brandon before it was announced that her adoption was going to proceed.

Callie and Brandon had to keep this a secret since it would've derailed everything for her to become part of her moms' family. But with Carmen exposing what happened, Stef was threatening to sue. And Callie told her she can't do that because she really did sleep with Brandon.

The sneak peek shows Callie in tears while telling her moms the truth. She even tells them that Carmen knew she was seeing Brandon after his mom filed a restraining order to keep him from seeing Callie.

Callie adds that she thought her foster care worker Rita was going to lose her license after a recording went through. This leads into the worry that all the details would've been exposed, which was definitely bound to happen at some point.

Stef seems to get angry at Rita about this, but Callie informs that it's not her fault. In fact, all Rita wanted was for Callie to have a family.

This leaves the question on what Stef and Lena are going to do from here. Given the way this scene ends, it appears that they have no idea what they're going to do about this. It's a tough situation and it might be a while before the moms are able to forgive both Callie and Brandon.

See the video below.

The Fosters Season 4 premieres on Monday, June 20 at 8 p.m. ET on Freeform.