Heart of a Fairy

Heart of a Fairy is a book in the Family Series, which is based on Bloom and her mothers.

Description
"Bloom and the other fairies of the Winx Club are preparing a surprise party for Vanessa, when Sky announces that on Domino he serves his Believix power to save Oritel and Marion from an enemy attack! The fairy will have to make a difficult decision... so she invents a good lie for her family and for the Winx, and flies to Pyros, where an old friend is waiting for her..."