Involuntarily

Anastasia's eyes closed. Her back arched and she came on his fingers. When she opened her eyes, she found his smoldering gaze looking over her body—her pink cheeks and skin, her hardened nipples and her tousled hair. With his glistening, swollen lips and gleaming eyes, he looked sexy as hell. She pulled her arms over her hand languidly as he watched her. Her eyes went to his erection and she gasped. 

Wet on the slit and skin stretched taut, she wanted to nuzzle it and wrap her lips around it. Very arrogantly he stroked his member and then hissed, "Spread your thighs again, Natya." 

In order to tease him, she lifted her right knee up and then slowly lifted the left one. Once they were up, she let them fall apart. 

"Oh fuck!" he hissed as he stroked himself again. "You are good at provoking, Natsya."