Green Girls by Michael Kimball
When struggling writer and borderline schizophrenic Henry Winter catches his wife in bed with his psychiatrist, the resulting fracas could result in him losing his son Max - and what's left of his sanity. And when his lawyer (paid for by a mysterious benefactor) turns out to be Alix Callahan, a firebrand lesbian poetess now living with her exotic bisexual lover July in a tropical florist's called Green Girls, his chances aren't looking too good. Especially when the tantalising July reveals a history of violence and sexual jealousy that landed her Colombian Indian husband in a maximum security jail in Florida. But Pantera is about to be busted out, and Henry is soon going to find himself with a leading role in a conspiracy of sex, drugs and psychosis that could have come straight out of one of his novels...