Zuko isn't totally against sharing. After all, he shared with Aang when he wasn't even awake (just waiting for someone to care about his tragic story it seems).
I took a lot from random episodes - set after my "tea" fic.
Insert fancy way of me saying I don't own Avatar here.
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Toph was wobbling on her seat, laughing. "So, you called..." she said spluttering "your uncle and a member of the white lotus - old gasbags?"
She was chuckling again. He grinned. It would have been more funny at the time if he hadn't been so annoyed.
Or if they hadn't later made him sit outside a room waiting for two hours.
"I remember when I first called Katara, Sugar Queen; she had a fit." Toph kept grinning, "She even yelled at Precious" she smirked, reffering to Aang. She waved her hand back nonchalantly. "That's when I first ran away to join the Avatar's elite squad" her voice was stoic but she meant it in humour.
Zuko looked down. He didn't really want to talk about Katara right now.
But the younger girl was being nice. So he decided to reciprocate.
"You were 12 when you ran away?"
"Still am" The grin faded. "My parents thought I needed to be protected. I may have been lucky to be born, I was born blind... but they still acted like I was on a tenuous thread between life and death. It took enough convincing for them to allow me to earthbend in the first place."
The fire nation prince kept his head down. "I'm sorry."
She didn't say anything.
"I was banished when I was thirteen" he said finally.
She offered him a smile. "It's not easy is it?"
Neither of them were alone anymore. Which still didn't mean that they fit in.
He shook his head sadly and then remembered she couldn't see him. "No" he said, voice husky.
Toph grinned again, changing the mood. "Have I ever told you what I called the most famous earth bender in the East?"