He Regretted It After I Dated His Twin Brother (Wrong Twin)

Jade was Lucian's secretary by day and his mistress by night.
It wasn't until she became his woman that Jade discovered just how ruthless and promiscuous Lucian could be. When she realized she might be pregnant, the man simply laughed and tossed the pregnancy test into the trash.
"Trying to trap me with a baby? Keep taking your pills."
On the eve of Lucian's engagement, Jade resigned from her job and ended their relationship.
But Lucian assumed she was merely throwing a tantrum. He waited for her to apologize and come crawling back to him, just as she always had before.
Days passed.
Instead of Jade, Lucian got the news that she had a new boyfriend.
His twin brother.
The man who shared his face and happened to be his sworn rival.
Overnight, Jade became his sister-in-law.
Lucian completely lost control. He searched desperately for Jade, determined to bring her back.
But Jade, who was pregnant, had vanished without a trace.