Izzy, are you—” he began. His eyes flew wide, and he backed up fast enough to smack his head into the wall behind him. “What is he doing here?”Isabelle tugged her tank top back down and glared at her brother. “You don’t knock now?”“It—It’s my bedroom!” Alec spluttered. He seemed to be deliberately trying not to look at Izzy and Simon, who were indeed in a very compromising position. Simon rolled quickly off Isabelle, who sat up, brushing herself off as if for lint. Simon sat up more slowly, trying to hold the torn edges of his shirt together. “Why are all my clothes on the floor?” Alec said.“I was trying to find something for Simon to wear,” Isabelle explained. “Maureen put him in leather pants and a puffy shirt because he was being her romance-novel slave.”“He was being her what?”“Her romance-novel slave,” Isabelle repeated, as if Alec were being particularly dense.Alec shook his head as if he were having a bad dream. “You know what? Don’t explain. Just—put your clothes on, both of you.
Cassandra Clare, City of Heavenly Fire
alec-lightwood, humor, isabelle-lightwood, simon-lewis