Sally Jackson or the use to be Carrie White kept her secret for years. Especially meeting a God of the sea and having his child didn't really go that good. She knew she would have to give Percy up someday but she wanted some time with him before she let him go. Not even her son known about who his mother really was. That's until the truth is about to get exposed and another secret comes out. And Percy look like he probably couldn't forgive his mom anytime soon.