Use "rosiness" in a sentence

1. When Marcus was sure I was under his spell, he moved his mouth to my twin peaks, sucking and nibbling, nipping with his sharp teeth, moving their stiff rosiness back and forth with his tongue

2. She then became conscious that he was observing her; but she would not show it by any change of position, though the curious dream-like fixity disappeared, and a close eye might easily have discerned that the rosiness of her face deepened, and then faded till only a tinge of it was left