Infinite Tides (Avengers Fan Fic)

Nyssa is Tony Stark's best friend, who he tries his hardest to keep hidden from public eyes. A dozen or so years before Howard Stark died, his best friend Celeste had a one night stand. Little did his friend know, that man was a demon who got her pregnant. A year after that one night stand she gave birth to a baby with beautiful hazel hair and light brown eyes. She named the baby Nyssa. She is left at the doorstep of Howard Stark and he takes her in without complaint and raises her, As she grows up, she develops many powers and has a lot to deal with, but she had a best friend through this all. Tony Stark. He was there for her through everything, but he never discovered her powers or her night terrors. Nyssa is now much older and living in Tony Stark's Malibu beach home. What happens when she hears about the Avengers? What about when Nick Fury hears a rumor about Tony and Phil Coulson does some digging into Tony's little secret? Find out.