1.   There was a wealth of meaning in his deep voice, and colour flared along her cheekbones.

2.   Colour flared in her cheeks, but she met his gaze with equanimity.

3.   He raised a mocking eyebrow and she felt the colour flare into her cheeks.

4.   Colour flared in her cheeks.

5.   Colour flared in her cheeks as she met his blazing eyes head on.