Possible Clues:

• Surpassing in rarity?
• Looking more embarrassed, when going to and fro
• Increasingly ripe, say
• Appearing more flushed, running up and down just the same?
• More embarrassed, even when upset
• More rare, as a steak
• More embarrassed, maybe
• What strawberries become as they ripen
• More embarrassed, say
• More embarrassed, one way or another