Mysterious CEO's Last Surrogate

Danica wakes up beside a strange man in the morning. The next day, she finds herself becoming the surrogate to a mysterious man, in the bid to save her twin sister Daniella from a ruthless mafia boss. But what she doesn't understand is, why did he change the rules? He wants her body once every month till she conceives yet; she can't see him face to face...
Sneak peak;
The moment he took a step, Danica recalled his promise and yelled, "Wait!" He halted but didn't turn his head in her direction. "Hmmm," he hummed.
Danica couldn't continue to live in anticipation of a faceless man coming to her room 4 times a week. She gathered her last courage and said, "you promised to let me see your face." Loney stiffened for a few seconds. He was a man of his words therefore, he had to face the unexpected. No matter what, it was bound to happen.