If you like what you see here, there are more stories on AO3 under the same name. (And I try to answer comments left over there because it's easier. So many people here have messaging disabled so I can't reply. So if you want to say something about the story and want me to answer, AO3 is the place to do it.) :)

Stories:

Congratulations, it's a Boy
"Sir, I have the results." "Okay, Jarvis. Hit me." "It's a match. 99.9% chance that he is your biological son, which is the percentage needed to be recognized by law as a biological parent." Tony's stomach did a funny swooping dance. "Great. Congratulations to me then, eh? It's a boy." (An AU in which Tony finds out Peter is his son.)

Come Undone (Sequel to Congratulations, it's a Boy)
Peter doesn't see a problem with being Mr. Stark's son in secret; he's just happy that he gets to be a part of his life. But while he's still getting used to the new normal, things in Peter's life begin to unravel. He realizes that he doesn't completely understand his powers, the police have decided Spider-Man's a menace, and some of the people at school are determined to make him miserable. And just when he thinks things might be settling down, someone discovers that he's Tony Stark's son and decides to tell the world.