She knows it was tragic, she just doesn't know the details... Those tears...
And now she's acknowledging Nasa is familiar to her. Maybe he reminds her of Shotoku again, same as he did in Ch.148.5.
Yeah, Nasa is a simple man when it comes to doing things for his wife. Very simple man. It's been pointed out before, but he really does go quite stupid when it directly involves her.
Our couple being cute...
And acknowledgement of the inexorable march of time... And the joys of love...