Why is Devlin surprised that Judy ends up with his best friend in "Winter Dreams"?

To a great extent, Devlin is suprised at Judy's
predicament because he feels that she could have done better.  He is not as surprised as
Dexter, who is mortified at the image of Judy presented, but Devlin reflects a sesne of
slight surprise at how Judy's life changed from the time she married to
now:

One day,
a man named Devlin comes to see him about business and tells him that his best friend is
married to Judy. Devlin admits that her husband ‘treats her like the devil’ while she
stays home and takes care of their children. He also reveals that ‘she was a pretty girl
when she first came to Detroit,’ but that ‘lots of women fade just like
that.’’

Devlin has no idea of
what Judy used to be like and what she means to Dexter.  However, his surprise comes at
the fact that Judy's life in Detroit has withered her from what she was to what she is
right now.  Devlin knows that his best friend is debaucherous and does terrible things,
which is why he cannot seem to understand why a girl like Judy would be involved with
someone like him.  Perhaps, this is why Devlin says that such a fate befalls upon many
young women.  In the end, Devlin's revelation hints at what he might perceive about
Judy, something that has to be confirmed with Dexter's intense reaction to what Devlin
says.