A Brat Blew Up a Manhole Cover, and I'm the One Who Has to Pay?

My girlfriend's younger brother is a spoiled brat.

During the New Year celebrations, he ran around setting off firecrackers in the street. I kindly tried to warn him.

But he snapped at me:

"What's it to you? You really think you're my brother-in-law? Do you even deserve to be?"

Later, he threw firecrackers into a manhole cover over a shopping mall's sewer, blowing up more than a dozen luxury cars worth millions each.

My girlfriend hurried over to find me and said:

"You said you love me more than anything. You'll pay for my little brother's damages, right?"