Sea of Solitude
22 Achievements
EA Play
Mama and Papa
Finished Level 2
How to unlock the Mama and Papa achievement in Sea of Solitude - Definitive Guide
Near the end of Chapter 8 and after finishing clearing the corruptions in the Sweet Home section you will be back in the sunshine on your boat, just go follow the houseboat again and it will pop. (Or you could say the very start of the Transition section of chapter 8.)
Story-related and cannot be missed.
See below for more details:
At the end of Chapter 8, there will be a cutscene where two monsters, representing Kay's parents, are arguing. Once this cutscene finishes, this trophy will pop.