She remembers the exact moment she agreed to go to the mid-winter yoga retreat. Her friend Vivian had been there before and told her she would come back a new person. Transformed. According to the brochure, The gentle trilling from an orchestra of insects interspersed with the croaking of frogs and the occasional haunting cries of owls will be a soothing and entirely natural symphony to fall asleep to. They’d sleep in secluded forest huts nestled in the tropical rainforest canopy. She was ready to pack her bags when she read that an optional extra was to book an alfresco…