So, this is my first nalu sex fanfic and I'm really not good at sex scenes. Also, the title barley makes sense!
~Anyway, about the story~
Lucy Heartfilia, and 17 year old, starts dating another 17 year old, Natsu Dragneel. They do some crazy things when there dating, but they get even more crazy once they turn 18! (They start having sex and stuff) One day, when Lucy and Natsu get drunk and have sex, Natsu forgets to use a condom (because he's drunk) and, well, Lucy becomes pregnant. Then they get married, Lucy gives birth :D