Holding Out For a Hero

Haleigh Conard has a nice life. She's a single mother to Avery Styles. Yes, Styles. Haleigh and Harry have had a rough history, which includes her leaving him after she becomes miraculously pregnant. But one day he bumps his way back into her life and finds out the truth about Avery. Will he want full custody? Or will he leave, and not be a father to Avery? (Not AU)