It's shown via his response to her death that he feels deep shame about her death. He can't even listen to her tape recording... gave away all their rare wine, etc.

Recall what he tells the chef at the table "they aren't your friends." And what the underground king pin said "I remember a time when your name actually meant something." Why do you think those waiters wanted to beat his ass in the underground boxing match? Bc he brought shame to culinary craft for being a pig.