Complex sentence: Maleficent then meets up with Regina, revealing that they're after the Author and they have leads that Regina does not, saying that The Queens are willing to share them if Regina helps them with a task.
Split into simpler sentences: Maleficent then meets up with Regina, revealing that they, too, are after the Author and that they have leads that Regina does not. She says that The Queens are willing to share the leads if Regina helps them with a task.