 During Darcy's dance with Elizabeth, they are interrupted by the locally prominent Sir Lucas, who thinks he is being complimentary in declaring them a handsome couple and suggesting a future alliance of Charles Bingley and Miss Jane Bennet.Later, at the post-dance supper, Darcy hears Mrs. Bennet loudly brag that her daughter Jane will soon to marry Darcy's rich friend, Charles Bingley.After the ball, Darcy and Bingley's sister Caroline discuss her brother's infatuation with Jane and agree that such an alliance will be disastrous for him.