Apart from the fact that she wanted Cynthia to be a distraction to Arthur, what Megan really wanted the most was to destroy Anna's marriage.
In her opinion, Anna was too devoted to her husband, there lovey dovey actions angered Megan. The man acted like he was holier than the Pope it infuriated the pregnant woman to the core of her bones.
The initial plan was to seduce him herself but that was a long shot since he had never once given her a lustful look talk more of showing interest in her even when she wasn't married. There was a possibility that it could backfire if she failed, fortunately Cynthia had come along at just the right time.
"Maria needs a bonus." She mumbled under her breath as she sauntered towards grandmother Loretta's study where Cynthia had said Logan was.