Not fully immune yet. Doubly so because while it was Sirius, it was also a version of Sirius she barely remembered. It wasn't the one who would shift from sadness to a near manic state dependent on the day. So Tonks was still slightly taken aback by it all.
She also had to wonder what that altered timeline would have looked like if they did figure out how to do better in their collective past.
Mentally shaking herself out of it, and eyes slightly narrowed in thought now squinting with her grin, Tonks waved off his lateness. "Though Remus is right. That one's a talker. He does make for good distraction when you need it though."
Then it was done to business. "Right. So we should check outside and see how wild things have gotten. Also should check on the wards then, yeah? We'll need some...and maybe some round inside. Least wise so we know if someone else shows up?"
Tonks chewed on her lip absently, thinking. "And do either of you know how to keep certain spells from being used?" She had come from battle, and could imagine anyone else coming from one and not being in Pomfrey's ward first. "Like the Anti-Apparation ward, but for Unforgivables."