Brothr Best Friend

My brother Lucas was at Jack's place, and later they decided to have a sleepover at Lucas's house instead. Lucas has three best friends: Jack, Ethan, and Liam. His friends know that he has one sibling, but they don't know whether that sibling is a boy or a girl, nor do they know how old they are. It's already 8:00 PM, and everything is lively downstairs as the boys chat, play games, and enjoy their time together. Meanwhile, Bella is upstairs in her room, relaxing and minding her own business, completely unaware of the fun and chaos happening below.