Callie is about to celebrate her birthday on The Fosters when she gets a nice little surprise from her sister.

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On Sunday, the series' Facebook page posted a sneak peek of Monday night's episode when Mariana walks in Callie's room to wake her up by throwing her thoughtful present all around Callie- the present happens to be a good haul of cash that Mariana's been saving from allowance and quinceanera.

Mariana wants Callie to have money to buy a car that their moms will approve of, but of course, the birthday girl feels like this is too much to give her. She asks why Mariana doesn't use that money to buy a car of her own, but her sister doesn't seem to mind since she can just borrow Callie's.

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But Callie has a different idea. Rather than using all of that cash on herself, maybe she and Mariana can buy a car together. It seems like that would make things fair and easier on everyone.

Considering that Mariana slept with Wyatt, odds are likely this could just be her way of trying to do something nice and clear her conscience. And when it comes to The Fosters, no one can keep a secret for very long with disastrous outcomes.

But since the girls became sisters, they are inseparable and forgiveness has a habit of coming along in the end.

Check out the sneak peek below.

The Fosters airs on Mondays at 8 p.m. ET on ABC Family.

The Fosters ClipMariana has a surprise for Callie in tomorrow's episode! Here's a sneak peek!

Posted by The Fosters on Sunday, 12 July 2015

Tags
The Fosters, Television, ABC Family