Hannah and the hurricane

"It's cheaper!" she says. "Yes," says a man standing behind her. "And it's going to be the only glass-bottomed boat on the island in a month or two. It's going to be 'Goodbye, Mr. Duval!'" And he laughs. 

Hannah works for old Mr. Duval on his boat. They take tourists to visit the coral reef. But someone is tying to destroy their business. The hurricane begins and Hannah risks her life to get to the truth.

I felt her way of thinking is very wonderful. But I wondered why she want to work for Mr.Duval. I thought they were family or something like that.