In the episode titled "I Do," Stef and Lena try to maintain calm when their parents descend on the Foster house for a very special celebration. Lena's dad, Stewart, has agreed to officiate the ceremony while her mother Dana and Stef's colorful, talkative mom Sharon, attempt to keep things civil while disagreeing on floral arrangements. Sharon tries to strong-arm Frank into attending. Stef avoids telling Lena she plans to return to work as soon as she is cleared. Meanwhile, when Callie's case against Liam boils down to her word against his, she must decide whether or not to lie in order to get some justice out of the situation. Callie and Jude get some news they've been hoping for, but Callie makes an emotional slip that could destroy any chance they finally have at happiness.