Does Orsino change his behavior during Cesario's story about her "sister" in Act 2, Scene 4 of Shakespeare's Twelfth Night?

Orsino's behavior certainly
does appear to change when Viola not only discloses her love story about her "sister"
but also when she has the audacity to reprimand him for
continuing to futilely pursue Olivia. We certainly see change in his behavior when we
observe him actually listening to both her story and her
advice, even though he has refused to listen to anyone else's advice
before.

There is certainly a great deal of evidence that Orsino, up
until this moment, has never listened to any one. One
example is in the very first scene. His servant Curio tries to distract him from his
severe pining over Olivia by suggesting he go out hunting. Orsino's only response is to
liken his own heart to a hunted deer, a deer being hunted by his own cruel emotions for
Olivia. In addition, in Act 2, Scene 4, he even ignores Feste when he so boldly asserts
Orsino's love is insincere and that he is fickle by stating, Orsino's "mind is a very
opal," meaning easily changeable (II.iv.79-80).

In contrast to these
examples, Orsino becomes very attentive when Viola as
Cesario protests Orsino's continued pursuit of Olivia when she has rejected him, arguing
that, despite what Orsino thinks, it possible for a woman to love a man as much as he
thinks he loves Olivia. He even asks, "[W]hat's her
history?," when Viola states, "My father had a daughter loved a man" (118, 115). He even
continues to listen when she states that her "father's daughter" never proclaimed her
love but silently endured her pain, "[s]miling at grief" (124). She even has the
audacity to state that Orsino declares a great deal in his "vows" of love, but shows
very little in his actions (127). Even after this audacious statement, he even continues
to show he is listening by next asking her if her "sister"
died of a broken heart.

Regardless, Orsino's change in
behavior is actually momentary, and after engaging in listening to her,
he demonstrates she has made him uncomfortable by so intimately talking about feelings
and goes right back to showing her who is boss. He shows her who is boss by responding
when she asks if she should return to Olivia, "Ay, that's the theme," meaning that that
should be the only theme or subject of their conversation rather than a discussion of
his actions and an account of how someone else dealt with love
(132).