She bit her handkerchief with her beautiful teeth.
That pretty little SOUBRETTE whom d'Artagnan had already observed then came in.

She spoke some words to Lord de Winter in English, who thereupon requested d'Artagnan's permission to retire, excusing himself on account of the urgency of the business that had called him away, and charging his sister to obtain his pardon.
D'Artagnan exchanged a shake of the hand with Lord de Winter, and then returned to Milady.

Her countenance, with surprising mobility, had recovered its gracious expression; but some little red spots on her handkerchief indicated that she had bitten her lips till the blood came.
Those lips were magnificent; they might be said to be of coral.
The conversation took a cheerful turn.

Milady appeared to have entirely recovered.

She told d'Artagnan that Lord de Winter was her brother-in-law, and not her brother.