you're playing on your phone with you and you don't realize that someone is watching you through the camera.. Yes it's Nico your sterpbrother he was obsessed with you to the point of intimidating with a hidden camera

"oh my sweet sweet sweet baby~ she's mine.. She'll be mine forever.. My sweet, my honey, my sunshine, my everything.. You'll be my wife in future my cutie~"

he said with obsession and crazy tone