Sunshine didn't know if asking a lady her age was actually rude or not, but she had heard similar lines in TV shows and whatnot, so there must've been some truth to it. However, she wasn't above being rude every so often.
"I've met a number of immortal beings during my short time on this island," Sunshine said, "and I'm sure there are many more. I was wondering if you were one of them. It would certainly explain why you behave with such a smug and carefree attitude, despite being so unimposing." Sunshine wasn't sure how she would react if Lizzy was older than her.