[Supperman]

Context) TIME 10 Questions

A veteran of six shuttle flights, Story Musgrave, 75, talks about the end -and the future- of space travel

(Question No.1 -No6, omitted)
(Question No.7)
What will you miss most if you never go to space again?
I'm planning to go to space again. I'll go as a tourist with the tourist companies.

(Question No.8)
Why, when you've already spent a thousand hours there?
I have a 5-year-old child now, and we're working on another one. Would you say, "Why do that?" Little Story is the light of my life. Would you say, "You got a 50-year-old---why do you need a 5-year-old?" Same thing.

(question No.9)
What's the strangest thing you ever did in zero gravity?
I'm the only one I know that sleeps floating. It's delicious. You don't know where you are, and after a while, because our limbs aren't touching anything, you lose sense that you even have them.
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Hi.
I can understand No.7 and No.9 clearly, yet I can't understand question No. 8 and its answer at all.

What is the question?
Why "why" and "when" exists at the same time?

"We're working on another one" means"I and my wife are planning to have another child and doing s*x", right?

"Little Story is the light of my life" means what?

Thank you.