"Oh, I - I didn't mean we should ..." Steph stumbles, words caught in her throat, hesitating over a face-saving lie.

Then she ditches it, unspoken. Why bother?

"It was wishful thinking. I can't do it. Yet." She waves at her leg. In swimsuit and hoodie, her legs are bare - and although they're faded, pale, the scars are still there, running up and down her skin, clustered at the back of one knee. "Can't run fast enough to jump. Yet."

The yet is very important to her.