I Should Not Want This

I should not want this. Or should I?
J and L have been friends for 20 years.
But 10 years ago, a spark ignited that changed everything. You shouldn't want to sleep with your best friend, should you?
After a decade apart, J was the first person L turned to when her relationship imploded, and he, like always, showed up.
After a deep dive into history, stunning truths are revealed.
Can a spark become a full-fledged blaze? Should you want to become fully engulfed by desire?