Q: In this task, you're given a context passage. Your job is to generate relevant questions that can be answered by directly referring to the passage.
She made an excuse and left , dragging Colin out behind her , closing the door with a wink that required her to use every muscle in her face . " Not very subtle , is she ? " Dom asked when the door was safely closed behind her . Lavender shook her head and laughed , though it didn't seem to ease his mind .
A:
What may have caused Lavender to laugh at Dom ?