A nasty or thrilling surprise?

"But…This…" Yin Fu gasped as he arched his back when he felt Mo Qiang thrust her tongue inside. Compared to a woman, mers bodies were way too sensitive and even more so in the case of Yin Fu whose entire body was filled with aphrodisiacs. With Mo Qiang winding up his body more and more, Yin Fu felt heart pop out in his eyes as he felt his body brimming with pleasure. 

Just as he was about to explode, Mo Qiang caught his hair and turned his face around. Her finger circled the rim of his opening before she thrust inside a finger and his opening was greedy for the touch of his wife sucking that finger right in. It was as if it was waiting for Mo Qiang to touch him.