Your... [ "your sister," he starts to say, right before her pun hits. he giggles, not a chuckle or laugh or a snicker but a full-on giggle, covering his mouth and looking to the side. ] Oh, wow. That one was pretty bad.

[ but he sounds a lot calmer for it, to be honest. and when he tries again, he doesn't look like he's panicking as he says: ]

I'm sorry your sister is here. Or... Maybe it's a good thing? I guess it's not really my place to decide that.