Freefall Summer — Tracy Barrett

WHUFFO: Someone who hasn't made a skydive (yet), especially a spectator. Supposedly derived from "What for do you jump out of a perfectly good airplane?"

Sixteen-year-old Clancy is no stranger to extreme sports. Her father runs a skydiving dropzone, but after her mother dies in a freak accident, her father grounds her--permanently. Clancy is resigned to being a whuffo and packing parachutes for her dad's latest girlfriend until cute college freshman Denny starts taking classes at the drop zone. Denny assumes Clancy is eighteen, an innocent mistake that gives her a rush--and that she doesn't correct.
But the lies snowball, relationships are damaged, and suddenly Clancy isn't the person she wants to be. She wants to make things right . . . but it seems the more Clancy imagines the life of a skydiver, the more she imagines she can escape her dull reality of life outside the drop zone. Will Clancy make the jump?