In the place where she heard Heathcliff termed a 'vulgar young ruffian,' and 'worse than a brute,' she took care not to act like him; but at home she had small inclination to practise politeness that would only be laughed at, and restrain an unruly nature when it would bring her neither credit nor praise.
Mr.Edgar seldom mustered courage to visit Wuthering Heights openly.

He had a terror of Earnshaw's reputation, and shrunk from encountering him; and yet he was always received with our best attempts at civility: the master himself avoided offending him, knowing why he came; and if he could not be gracious, kept out of the way.

I rather think his appearance there was distasteful to Catherine; she was not artful, never played the coquette, and had evidently an objection to her two friends meeting at all; for when Heathcliff expressed contempt of Linton in his presence, she could not half coincide, as she did in his absence; and when Linton evinced disgust and antipathy to Heathcliff, she dared not treat his sentiments with indifference, as if depreciation of her playmate were of scarcely any consequence to her.

I've had many a laugh at her perplexities and untold troubles, which she vainly strove to hide from my mockery.

That sounds ill-natured: but she was so proud it became really impossible to pity her distresses, till she should be chastened into more humility.