She's reaching a point of no return, feeling so overcome by her ecstasy that she nearly breathes a sob against his lips. If she were an outside observer, watching their total surrender to love and passion would be enough to make her blush, but here in their bed with him she doesn't care how she looks. The only warning she can give him is a sharp cry, a sudden burst of sound before she shudders over and around him, clutching onto him for dear life as she rides through the cresting waves of true pleasure.