Snakes were a group of predators that fascinated my girlfriend more than lizards. All though they had no legs, snakes could effortlessly move across the ground with their scales and muscles, and by wishing your girlfriend to be a naga, the Genie could give her that experience. But snakes are carnivores, poisonous and non-poisonous alike. Dealing with a naga could be dangerous. There was also the myth from stories that nagas hypnotize people, that was something for you to be concerned about. Your girlfriend would be beautiful as a naga and the genie could grant your wish for her to be one in a snap, but there was the worry of risk of getting crushed, brainwashed, or worse. But you had to put all that aside. This was your girlfriend you're thinking about. Sure she wouldn't be her usual self, but you two loved each other bones to bones.
Better tell your girlfriend what you have done. How quickly will the wish take effect? The genie didn't say and you didn't specify. You're not sure where your girlfriend is right now either. You pull out your cellphone and call her. You anxiously listen to the ringing, hoping she will pick up.
After several moments, no response. You come home only to find out...