Nostalgia

"How old are you and Rias?" Rudy asked in a curious yet calm voice.

"How old do you think?"

"No, no. I asked you that. You can't ask me the same question. Even more, I don't want to guess it wrong only to make you annoyed and get angry at me for no reason," Rudy uttered with a sigh.

"I won't get angry, I promise. And if you guess my age right, you might also get a reward from me."

Rudy pondered for a while and said, "This is a trick question, isn't it?"

Jane averted her gaze and said, "It's not."