SOLVED. Book about a girl whose mom is a swan (?) [s]

[Crystal]

I read this in my public library in the early 2010s. It seemibgly disappeared from the library a few years later. What I can remember is that the protagonist libes with her single father, but then one day sprouts wings. Her crush is involved somehow, and later she ends uo meeting her mom. I remember the cover might have had a girl with dark hair on the cover and the moon?

[Marisa]

The Next Full Moon?

[Crystal]

Yes, that's it! Thank you so much!