She had analyzed them much as if they belonged to someone else, and wondered what lay behind their mask, and what their capabilities might be.
But this morbid condition mostly affected her when she was at home, listening to the unpleasant bickerings of her father and mother, who quarrelled constantly over trifles that Beth completely ignored.

Her parents seemed like two ill tempered animals confined in the same cage, she thought, and their snarls had long since ceased to interest her.
This condition had, of course, been infinitely worse in all those dreadful years when they were poverty stricken.

Since Uncle John had settled a comfortable income on his niece the grocer was paid promptly and Mrs.De Graf wore a silk dress on Sundays and held her chin a little higher than any other of the Cloverton ladies dared do.

The Professor, no longer harrassed by debts, devoted less time to the drudgery of teaching and began the composition of an oratorio that he firmly believed would render his name famous.

So, there being less to quarrel about, Beth's parents indulged more moderately in that pastime; but their natures were discordant, and harmony in the De Graf household was impossible.
When away from home Beth's disposition softened.