Maddie and Ben have been in a relationship for nine years. They call their commitment to each other a "valid life choice." But Maddie is thrown for a loop when her younger sister, Mia, announces she is marrying her boyfriend of seven weeks and they are having a baby together. The surprise -- for Maddie, anyway -- is that her parents, wed 35 years, are happy about Mia's choices. Which leaves Maddie and Ben questioning everything about their own relationship.