He is asking question because his mother died the day after he was born so Caleb never really met his mother. I think that all Caleb is trying to do is get a good mind picture of his mother. Caleb probably wants to feel like he is with his mother every second of every day. I think that Anna has gotten over her mother because she doesn’t seem that sad when she talks about her. On the other hand papa tries his best to act like their mother but probably hasn’t gotten over her yet.