Had he done his duty properly, he would gently have pushed her from him, have sprung to his legs, and have declared that, however faulty might have been his previous conduct, he now found himself bound to make her understand that he did not intend to become her husband. 
He ought to have gently pushed her away, have sprung to his legs, and have declared that, however faulty might have been his conduct, he did not intend to become her husband. 