Is It Wrong To Be Happy? (Billie joe Armstrong x reader)

y/n is just the typical highschool adom bomb. smoking dope and mowing lawns. but her mom and dad got divorced when she was twelve leaving four years to mourn and wallow is sorrow and self pity, though truth be told she was over it a year ago and was curious of who her mom would end up with. though Billie joe was not who she expected nor wanted with her mom... is it ok to have sexual fantasies about you're mom's boyfriend??? is it wrong??? or is it her fault for doing it knowing you had the biggest crush on him since you were twelve??