Bruce knows Natasha feigns her interest ih him.
He has eeen her throw longing looks at the archer.
He doesn't understand why she doesn't pursue Clint.
Her feelings are returned.
But then he finds out about Clint's family.
And he knows how painful it is for the two assassins.
He can see Laura knows too.
But doesn't say anything.
He wished he could help them but he can't.
He is starting Widow too.