Fearing that their sex life has become stagnant, Whitney dresses up as a sexy nurse for Alex, but it results in a real trip to the hospital. Also, the gang attends a wedding and Lily starts a food blog.

Whitney tries to get Alex to role play the first date that they never had, but she becomes angry when he can't figure out how to play by the rules in her head. She kicks him out of the apartment, and the guys and the girls take sides.

Whitney catches Alex checking out another woman and decides to give him the silent treatment until he admits it. Neal tries to avoid the crossfire by sending Lily a series of gifts, and the girls push Roxanne to update her Facebook photos.

In an effort to prove that Alex uses a condescending "tone," Whitney has Mark put a camera in their apartment that their friends monitor as she tries to pick a fight. Complications ensue when Alex's brother shows up.

Alex and Whitney attempt to get married, but an expired driver's license, a broken finger, and the wrong paperwork prevent their nuptials. Meanwhile, Mark confesses his feelings to Roxanne.