Josh, while taking a break from his stocks and securities activities, encountered a troubled woman in Hawaii. He wound up in the middle of a debacle, between a sibling rivalry and an Adonis, but wound up making the trade of his life. The sisters/lesbian tag comes to light very, very late in the story and is not a prominent theme.
Growing up my cousin Kristin and I did everything together - including a few boys. We even masturbated together although we never touched in a sexual way. Funny thing ism we each thought the other wasn't into girls even though neither of us knew the other was having sex with her mom! When I was away for college I knew my dad missed fucking me but it wasn't until summer break before they told me how Kristen had started substituting for me practically the day I left!