It's rather hard to smile when you happen to be devoting the use of your mouth to driving a god to distraction. Like he did, she's only going to use her mouth to bring pleasure to him. She takes his tip lightly between her lips, using their smooth texture to increase sensations. Stella's  being a little bit careful so that she doesn't catch him with her teeth when he bucks. Leaving off of that, she kisses along his inner thighs, feeling him twitch and jump as she moves back to the rest of his package. She nips with her lips at the skin of his scrotum, alternating pressure as well as adding a touch of her tongue here and there. His moans sound like heavenly music to her ears.