Sirius grinned and hugged her back, more pleased than he would admit to actually be invited.
"I won't crash your lunches. Unless you think you need someone to keep things lively! I'm great to pushing awkward conversations."
He leaned back, letting go of her enough get comfortable.
"Have you thought much about what we're doing here? About why the castle brought us?" He looked up at the ceiling. "I have. A lot. It's weird, actually, when you think about who made it here and who didn't. Your whole family, at least the Potter side. That's got to mean something, doesn't it?" Though Sirius wasn't sure exactly what.