Apparently, her little brother doesn't care if his older sister is one of the biggest names in Korean entertainment, because he's 더 많이 bent on ignoring her. 아이유 uploaded screenshots of her conversation with her little brother onto her fancafe, and most of the chat is 아이유 trying to get her brother's attention 의해 texting "Hey" over and over again.
At one point, 아이유 gives up with the string of "Hey"s and says instead, "If 당신 keep ignoring me, I'm going to stop giving 당신 all allowances." Only then he answered, "Why?".
After a few 'conversations', she finally concluded. "Oh, I guess 당신 just don't read my texts anymore."
The conversation amused many fans, who commented, "In the end, they're just normal siblings..", "To him she's just the annoying older sister", and "She's looking out for you!"
source: allkpop