Fist Full of Lies: The Enemy Within

The Baillou Family are in a celebratory mood - Agnes is having her first child, and today is the big reveal. Xavier is ecstatic he’s becoming a grandfather for the second time, this time hoping for a grandson - his first, Amelia is ten years old and coming into her own. Alexandre is over the moon excited to become an uncle, he’s been her rock the nine months of waiting for her surrogate to give birth. Dala, his wife is most excited because it relieves her of the duty to give him a second child - she’s loving that Amelia is so independent and she can focus more on her career and the family business. 
Then the calls starting, first to Dala - she became an ally to a most unsuspecting person, they have plans to rid the world of this nuisance by the end of the year. Then the caller began harassing Mavis, Silas’ wife and Dala’s mother - Xavier then intervened and now the caller is threatening to reveal his secret to his son and boasting that he knows the true identity of Lyle. 
Xavier and Silas have been at odds, since it was revealed that Silas has fathered a daughter with Marion, but for the sake of their families they have made amends - the family convening in New Providence, The Bahamas to meet with Lyle’s private investigator Nathan, to solve this mystery. The families unite, no matter their personal rifts, they unite when an enemy intervenes. 
Who could be the enemy withing?