A man who's had a runny nose for weeks comes into the clinic for the fourth time. Thinking it’s nothing more than a cold, Bailey wants to send the man home. But when she sees blood on his pillow, she orders a CT scan. It turns out he was leaking spinal fluid through his nose because of a brain herniation. Bailey feels terrible about having sent him home three times before and insists on scrubbing in.
Ava, aka Jane Doe, is on bed rest near the nurses’ station, which means she gets all the good gossip. She hears about Addison’s “no sex” bet with Sloan and spills the news to Alex. When Ava starts seizing, they need to do an emergency C-section. Ava panics but Alex assures her she's ready and she's not alone.
Addison confronts Alex in the hallway, demanding to know if she has another Denny Duquette situation on her hands. In the heat of their confrontation, she kisses him and pushes him into the nearest room where they tear each other's clothes off. Mark sees them emerge from the room afterward and puts two and two together.