It is an unspoken jealousy, the one that women feel towards young girls.
Insecurity is its main root, which is then only amplified by their partners' appreciative glances.
It is only natural, though.
Pretty, blossoming teens are biologically superior, whether the focus rests on their taut, flawless skin or on the freshness of their healthy eggs, making them more desirable to the primal part of a man's brain.
Women are perceptive, though they may not vocalize their observations, they do notice the longing, lustful quick glimpses that their husbands take of those lively, young girls and they know that those lithe, perky bodies will be parading in their men's mind, that they will be the center of many fantasies.
And what can they do about it? They know they can't compete, so they're only left with hope.
Hope that their husbands won't get a taste.