What might have happened if Willy had told Linda about his affair in Death of a Salesman?

This is one of those interesting "what if" questions that
we have to infer our response from the text that we have. Clearly we have no way of
knowing how Linda would have responded, but from what we know about her character as
displayed in this play, we can perhaps say that she would have been hurt, but would have
quietly suffered, staying with Willy and remaining constant in her affections for him.
Note the way that Linda is so caring, patient and loving to Willy in Act One and
throughout the play. She waits on him, encourages him, gently makes suggestions about
what he should do in terms of work and his relations with his sons and is above all
constant in her sacrificial love for him, even when she must know that he has hardly
been a success in life. Note how she responds to his angry demand that she opens a
window with "infinite patience," saying that "They're all open, dear." Note what Willy
himself says about Linda to her:

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You're my foundation and my support,
Linda.

Clearly he recognises
how loyal she is to him, which of course makes his own betrayal even worse. All of this
evidence suggests that Linda would be loyal and remain silent about the pain that
Willy's betrayal would have caused her.