Cassian blinks when Ruby gets into his personal space but he doesn't freeze up; instead, he just keeps very, very still, taking in a soft breath of her own scent. It's still strong, rattling around in his sinuses and settling in his clothes, his hair, against his skin. "A very good thing."

He should, some part of him thinks, get a goddamned hold on himself but that doesn't seem likely to happen anytime soon. Not until she kicks him out, at least, but he knows that he'll go the moment she does. Whenever that's gonna be. She smells like her heat is approaching and fast, but he's not going to try and tell an omega that they don't know their own body.

Especially one like Ruby.