Even if it's taboo incest, if they're not blood-related sisters-in-law, the hurdle is lower, and it doesn't take long to cross that line. If the 'women' closest to you are sisters-in-law, you can only think of them as sexual objects. Ever since I was introduced to these sisters-in-law by my parents, I've been smitten with them and waiting for a chance to have them. "I'll take responsibility, so it's okay if I come inside, right?!"
