Why did Arjun Kapoor make fun of Sonam Kapoor?

The Ishaqzaade actor says that cousin Sonam Kapoor is his big support, but the young lad can’t forget the times when he relentlessly made fun of her

“I don’t get time to hang out with them (Anil Kapoor’s kids Sonam, Rhea and Harsh) these days. Initially, I used to make fun of Sonam, saying she was only interested in looking good all the time and sleeping early, but now I know what it all feels like. When you have a sister in the industry, the best thing is the big support.”

-Arjun Kapoor