The next day at the funeral, Shawn sees Sigrid place the note he saw earlier into the coffin with Gregor. They were having an affair. Shawn figures Ciaobella found out about it and killed him. But as she goes up to pay her final respects to her husband, she keels over onto the body, dead. Lassiter and Juliet question Sigrid, thinking the model was upset Gregor wouldn't leave his wife, and so killed them both. But Sigrid insists she always knew he wouldn't leave her. He put his wife on a pedestal and wouldn't even let her drink out of her glasses, but she accepted it and loved him anyway. She says the person with the most motive is Emily, who now inherits control over the company. She wasn't their assistant. She was actually the vice president of the Ciao. Juliet goes to question her and finds the once mousy Emily is now fully in control of the fashion house, supplanting her bosses in every way, even drinking Ciaobella's energy drinks.
Back at the Psych office, Shawn is doing research on Emily when he notices Gus wearing a familiar shirt. Gus tells him it's a Gregor Uwe-Steeb original but Shawn recognizes it as one of Emily's designs. He remembers at the party, Gregor taking all the credit for the new line and realizes he and Ciaobella were stealing Emily's designs. The toxicology report comes back on Ciaobella and the only other things in her system besides poison were the ingredients of the energy drink Emily brought to her every day. But when they go to the studio to arrest her, they find her unconscious at her desk. Luckily they got to her in time to pump her stomach and she tells them all she had to eat was some tofurkey jerky and an energy drink. Shawn now realizes what happened and gathers everyone at the Ciao fashion show. When they get there, a retrospective video is playing that says Gregor and Ciaobella were actually secretly married long before anyone knew and were about to celebrate their tenth wedding anniversary, meaning if they had stayed married any longer, all of their assets would be split down the middle. The video also shows Ciaobella creating one of her early designs, a dress made of lights. Now all the pieces have fallen into place and Shawn takes the stage to announce that it was actually Gregor who killed Ciaobella, even though he died first. He wanted out of the marriage but didn't want to go through a financially crippling divorce, so he poisoned her energy drink mix. But it took a long time for the poison to take effect because she was bulimic. Which also explains why he wouldn't let Sigrid drink out of her glasses. But Ciaobella knew about the affair and used her electrical knowledge to rig the mic stand to kill Gregor. Emily got caught in the crossfire by using the still poisoned energy drink mix. Shawn has solved the case but since all the culprits are already dead, one of his most spectacular reveals ever ends in a whimper.