French Film Night - Enorme

The movie is for adults as there is a bit of strong language in it.

Famous pianist Claire (played by Marina Foïs), not exhibiting any maternal instincts to speak of, suddenly finds herself pregnant after her husband/assistant/all-round organiser (played by Jonathan Cohen) decides he desires a descendant of his own, following an impromptu delivery witnessed on a plane, mid-flight. He commits the unforgivable and makes a child behind her back. Claire turns into a whale and Frédéric becomes a doting father.