During a trip to the mall for makeup, Julie's water prematurely breaks. With Eric rushing home from a business trip, Julie ask her friends to be present during the birth. Andrew and Lauren must abruptly abandon their romantic weekend getaway. Danny offers to help by ensuring that their hotel plans don't go to waste.

When Lauren's cool younger sister, Heather, visits for a job interview, Lauren launches a campaign to convince her to move to Los Angeles. She would love to have Heather nearby when the baby's born, but will her aggressive attempts to sell her sister on LA end up pushing her away? Meanwhile, as Lauren's consumed with her sister's visit, Julie convinces Cooper to keep her company while Eric's away on business. But when new mom Julie falls asleep from exhaustion, Cooper is confronted with one of her greatest fears -- a crying baby Perry.