Writing About God and Sexuality

For some reason if I write about a person's relationship with the Devil (reference to the story I am writing) God then I also have to bring up sexuality. My protagonist finds comfort and coping in masturbation at an early age. Her younger sister is autistic. Her mother is devoted to taking care of the sister. The father is devoted to avoiding life at home. The protagonist is, for a while, obsessed with "tricking" God (You're welcome Humanities). As she gets older she stops thinking so much about her relationship with God and sees her family for what it is, and subsequently acts out and rebels against her imposed responsibility.