Is this a good novel idea?

Its called The Night it Rained and this is how it goes: The one night that Poppys mother goes out for a walk to pick up bread is the night she is hit and killed by a drunk driver. Now struggling with emotions and money, poppys oldest sister sandra and second-oldest sister yasmine get part time jobs to afford the house, everyone cutting down on everything they can. when the first bill comes, the sisters money combinded still isnt enough. sandra then drops out of school to afford the house and her siblings. seeing how their mom dissapering is destroying everyons lives, poppy decides to turn to the only person she can: her father, who had left them when sandra was young. Her quest begins when she interviews his past coworkers and people for answers and support from the person who started it all. I have some plot twist ideas: -At first, he doesnt offer to help at all -Hes the one who killed the mother So do u like it? if you have any better ideas please at least have 3 sisters in it- oldest, middle and youngest