By Nancy Dillon Slash’s ex-wife Perla Hudson is urging a judge to go easy on the Los Angeles woman who admitted she supplied the liquid ketamine that led to actor Matthew Perry’s overdose death in a hot tub two years ago. In a two-page letter submitted to the court and obtained by Rolling Stone, Hudson praises Jasveen Sangha as a good friend who helped her weather her divorce from the Guns N’ Roses rocker. Sangha, dubbed the “Ketamine Queen” by prosecutors, pleaded guilty last September and is set to be sentenced on April 8. Sangha, 42, is asking for time served, arguing she’s a first-time offender and has been in federal custody since her indictment and arrest in August 2024. Prosecutors are asking for a sentence of 15 years in prison followed by three years of supervised release. “I have known Jasveen since 2012, and over the years she has become like a younger sister to me and a beloved ‘fairy godmother’ to my sons,” Hudson wrote in her letter to the court filed Wednesday.…