Having an overprotective big brother is pretty standard, but when he's a mega pop star that rolls with the likes of Justin Bieber and The Real Housewives of Beverly Hills, all bets are off.
That's exactly what Alli Simpson is dealing with when it comes to dating. Speaking to TheFIX at Nickelodeon Slimefest, the model/pop star-in-training let us in on what life is like with Cody Simpson as a big bro.
"He's very protective when it comes to boys, especially when I'm hanging out with him and his friends… 'cause his friends are really cute so I don't know what to do, " laughed the 16-year-old.
"It was funny because he got really protective when I had a little thing with his friend… Cody wasn't that happy about it when he found out, but then he thought, 'You know, if we're both happy'.
"He had to get over the fact that it was his friend and his little sister. But now the age gap is closing, I'm 16 and he's 17 and we've been friends with each other's friends and obviously he's going to start dating some of my friends in the future."
Cody made headlines recently after splitting with Sports Illustrated model Gigi Hadid, but Alli says that Gigi and her family are still a big part of their lives.
"They've had their ups and downs but they're still tight, Gigi is like a big sister to me," she said.
"Her mum Yo (Yolanda from The Real Housewives of Beverly Hills) is incredible, they're a beautiful family. When Cody was spending time over there we'd go over for dinner and they'd have the film crews there and stuff like that, it was interesting to see the TV side because it's different to what we do."
Alli tells us there's no plans for a reality TV show for her and brother Cody just yet, with both focusing on music (uh, like Cody's upcoming duet album with Justin Bieber!).
The siblings took to the stage over the weekend at Nickelodeon's Slimefest in Sydney and Melbourne.
"This performance just now was my first time ever on stage," Alli said. "Before I went on stage, [Cody] spoke to me for a good hour… without him I would be a mess."
Check out Alli and Cody in action at Sydney's Slimefest in the video below!
A one-hour Slimefest special featuring highlights from the Sydney show will air on Nickelodeon today at 5pm.
View slideshow: Ricki-Lee, Michelle Bridges, Commando, Cody Simpson and more celebs at Nickelodeon's Slimefest 2014…