for me i am having a feeling that Julia will test Emerald, i dont think she's that mean. though last night's episode when margarita and julia argued infront of the church, i was team margarita. XD
in the book, Julia is sophisticated and nice without plasticism treating Emerald. she actually likes Emerald for her son, in this series i dunno how she'll change to make herself like Emerald. i believe it won't be too soon... Julia holds the secrecy to the family and she'll be the one to reveal Jaime's true identity, from this... this will stop the war between the two families.
Don Leon treats Nathaniel as the next heir of the Fortalejo businesses, however, Nathaniel holds the last name of Cervantes, Margarita's husband. once Don Leon learn the truth from Julia and this might end the war of the two families. especially if he finds out that Jaime is his own son. XD