Nancy colored hotly?

[thedaffodils]

"A little girl -- coming here, Miss Harrington? Oh, won't that be nice!" cried Nancy, thinking of the sunshine her own little sisters made in the home at "The Corners."
"Nice? Well, that isn't exactly the word I should use," rejoined Miss Polly, stiffly. "However, I intend to make the best of it, of course. I am a good woman, I hope; and I know my duty."

Nancy colored hotly.
"Of course, ma'am; it was only that I thought a little girl here might -- might brighten things up for you," she faltered.
"Thank you," rejoined the lady, dryly. "I can't say, however, that I see any immediate need for that."

Source: Pollyanna

What does ' colored hotly' mean? Thanks!

[Barb_D]

She blushed red with embarrassment.

[thedaffodils]

She blushed red with embarrassment.

Thank you for your help again, Barb_D.