The TriMathletes start shuffling out of the room. Friedman, luckily, doesn't notice Joan. Luke comes over to Joan, and he seems happy: "I went to another place. Like, I reached another plane of crystalline thought in probability theorem." Joan says if she wants to hear about his genius, she'll ask. Luke: "Of course. Boring. Sorry." She stands up, and Luke leaps forward to help her, eliciting a puzzled look from Joan. As they walk slowly along, Luke tells her he talked to Adam about their relationship. Joan: "Who told you to do that?" Then: "What did he say?" Luke: "He's not going to be a part of this, Joan." She looks unsurprised and says, "Oh." Then she asks, "Part of what?" Luke: "I know, okay? You left evidence in the bathroom." She doesn't know what he's talking about. Luke says, "I know you're pregnant." Joan looks utterly shocked and horrified, and quickly looks around to see who might have overheard. Luke continues, "And obviously Adam is the father." Joan gasps, "Oh my God...you are really on another plane, aren't you?" Luke: "Adam's not the father?" Joan quickly explains, whispering the last word, "I'm not...pregnant." He wants to know why there was a pregnancy kit in their bathroom: "Because I'm not pregnant and I'm pretty sure Kevin's not pregnant, which leaves..." Joan: "Mom." Luke: "Okay, I'm an expert on probability, and given factors such as Mom's and Dad's ages, birth control, and the average frequency of sex after twenty-three..." Joan puts one hand over her ear, and says, "Aaah! Eww?" Luke, the big expert, insists the probability is low. He asks, "So what do we do with this?" Joan: "Nothing. Nothing. We're going to let her tell us, and...be grossed out...but really happy." Luke: "Yeah, I'm comfortable with that."