Very highly rated 🌶️ spicy books that are romantic slow burn, not BDSM?

I'm kinda looking for something that fits this mold...

-no children. -no bondage/bdsm/etc. -spice level 4 or 5. -slooow burn. -World building, enveloping and complex story line in general with fantastic plot. -no 'FWB to Lovers' style. -M to F relationship, no poly or triangles. -Driven by love and romance, not lust. -Complex Characters. -Can be a standalone book, but would prefer one that had multiple books involved. -Has to be available on Audible (I have ADHD and need book on tape to follow properly). -Highly rated/popular.

Any ideas?