Aylen Vega, Santiago Oliva Castillo
Given the age of both characters involved, and the age of the son being added, this falls under the Amended Character Plus category which is defined below for you.

Aylen and Santi would have still been in school when they had this child, this child will have made an impact on their history and changed their lives somehow and this needs to be reflected in their applications. Having a child definitely falls under MAJOR changes

AMENDED CHARACTER PLUS.
these are the characters where major changes have been made which do affect who the character is a person such as their personality (unless developed via RP) or their histories. These characters require a new application and 1 activity check per character. You must wait 1 week between amended characters.

Aylen Vega

Very well, if Santi is unaware, then his app does not need to be amended but Aylen's does.

The Memory Charm is a spell that erases specific memories from an individual's mind. It is one of the most potent and potentially dangerous spells, as it can lead to severe and permanent memory loss if used incorrectly, and given that Aylen is having a HUGE chunk of her memory erased, her parents are going to have to fill in the blanks about what the heck happened in that chunk of time otherwise she's smart enough to know something isn't write and all of that needs to be reflected in the application.