So I messed up the tale of the big three then re-wrote PJO some what so that Percy is a girl(fem!percy=Seph). I didn't actually take the time to re write the whole ten books, in fact I wrote the majority of this before the Blood of Olympus even came out(still haven't read it)on a different account.
So, Sally died in a fire while Seph was a baby, prayed to Hestia to save Seph and Hestia obliged. Hestia also gave Seph her blessing then asked Pepper Potts to adopt Seph because Pepper couldn't conceive. Also Pepper and Tony got married when they were like 21. So Seph is the adopted daughter of Pepper and Tony Stark, but they love her all the same. All that shit happens, I wrote my own take on the end of the final battle against Gaea and even changed the original story of the Big Three.
So, yeah, please read