Demigoddess ~ Dean Winchester's daughter

13 years ago Dean met a demigod named Melissa during a hunt. One thing led to another, and the two slept together. The outcome of their night together was Maia, their daughter. When Dean found out Melissa was pregnant he visited her all the time but had to leave for good when Maia was still just a baby. Now almost 10 years later Dean runs into Melissa and Maia on a case in Colorado. After Melissa suddenly dies, Maia has to go live with Dean.
How will the two survive each other?

Takes place in season 5 of Supernatural
Book 1 of the Ultimate Power series
(heavily inspired by the PJO series)