About a girl who ran into the forest and never came back

What happens when nassica Malfoy had given birth to Furternal twins name Draco and Dalia, but when Dalia was given a gift from her godfather ( prof. Snape ) she will have little trobel controlling it when she realized the power the she holds. When she gets her letter on her 13th birthday and goes to Hogwarts with her very protected brother draco and his goons what will happen when she is sorted into the same house as draco and meets Harry Potter and is friends. A/N I'll try following the movie but I kinda don't want to