Big Sexy. Juan Mendez Scott's Mystery Magazine, #3

Big Sexy, the suspense riddled story of Maggy and Netta, rivals in high school where it ended in tragedy when Netta stole Maggy's boyfriend away from her, the most popular boy at school, Craig Blackburn. When Netta broke poor Craig's heart he decided to get back together with Maggy, but to her shock, he committed suicide right in front of her on prom night, leaving a note behind that he blamed Netta.
Ten years of mental problems and nervous breakdowns followed Maggy into her marriage with rich real estate mogul Duane Marretti. And finally when she thought she could move on, leaving her dark past behind, Maggy runs into Netta at the mall, and it all comes back to her, how Netta almost ruined her life. When Maggy catches Netta flirting with Duane she promises Netta that if she tries to steal Duane from her the way she did with Craig, she will kill her this time.
Excepting the challenge, Netta goes after Duane, promising to do again to Maggy what she did to her back in high school. Ruin her life!