What are the spiciest revenge romance books?

Of the 9 revenge romance books smutrecs.com has rated, the spiciest are God of Ruin (about 5/5), Neon Gods (4/5) and Scream for Us (4/5). 7 of the 9 are rated spice 4 or 5, on a scale from 0 to 5.

1. 
   God of Ruin by Rina Kent spice about 5/5
2. 
   Neon Gods by Katee Robert spice 4/5
3. 
   Scream for Us by Molly Doyle spice 4/5
4. 
   Twisted Love by Ana Huang spice 4/5
5. 
   Her Soul for Revenge by Harley Laroux spice about 4/5
6. 
   My Dark Romeo by Parker S. Huntington spice about 4/5
7. 
   Vicious by L.J. Shen spice about 4/5
8. 
   Moon Touched by Elizabeth Briggs spice 3/5
9. 
   Payback's a Witch by Lana Harper spice about 2/5

Each book page lists the sources behind its ratings. Ratings marked "about" are estimates. How we rate