Why does Montag remember where he met Mildred at the end of the book? Does it make it more/less significant? Does it mock their marriage?

Montag remembers Mildred When the bombs begin to fall. At first he tells the other intellectuals by the fire that he feels nothing for Mildred but when the bombs fall, he thinks of the time they met:

I remember. Montag clung to the earth. I remember. Chicago. Chicago a long time ago. Millie and I. That's where we met! I remember now. Chicago. A long time ago.

This harkens back to a time when Montag did love Mildred. I think it is important because there was a time in their marriage when it was real. I don't see any mocking here.