"We have to do something." His glance there is questioning. He says we, but he wouldn't blame her for stepping out, here.

"She says she doesn't want to see him again, but... she needs closure; she needs to move on." At the very least, they need to talk to this man to find out who she is, to be sure that if she has any family, they get closure. It's a massive impending headache and, sitting up, he braces his head in his hands, aware of this. He's not even sure what 'do something' means. Drag him here, rub his nose in it like a bad puppy? He is fully prepared to do that. Report him to the authorities? That, he's much more hesitant over. For many reasons.