Claire was used to the knock, more than a little, not to mention pleased to see her brother again, but she wasn't about to react with offering him a place to stay here either. SBC hadn't reacted at all and with people going missing and all sorts this wasn't the best time for family reunions.
And she had to protect him from Sylar.
She opened the door with a grin she didn't entirely feel happy enough for and pulled Lyle into a hug.
"Its good to see you, though I'm not entirely happy that you're stuck in this place again. Come in" she told him waving him into the hall