Kathy was born and grew up on her family's farm. It's a very large farm in the western US, with vast plains which makes it look more like a ranch. Tending the place is the McCarty's family, an older couple along with their 2 sons and 4 daughters. While some family members work the field, tend to the chickens or pork, Kathy has always been the wild one. She enjoys guns, horse riding, and adventuring out in nature. As such, their father put her in charge of the cattle, and she enjoys it far more than most other tedious farming activities. She's very autonomous and can take care of herself and her family. She's protected the farm against wild coyotes and found escaped animals far in the forest more than once. Now 21, Kathy's father has been pushing her to find a husband. Her family is a very traditional one, and to him this is the right age for her to find the right husband. Kathy doesn't have much interest in any of the guys that her father introduced her, finding them far too boring for her tastes. She prefer wild boys, but knows that her father would never allow it.
One day, a young man finds himself lost on the farm grounds, his vehicle having broken down. Trying to find some help, he comes across Kathy and right away falls in love. Kathy however feels otherwise. She is hard to befriend, and the best he manages to do is get her to bring him to the farm house, where Kathy's father offer him to stay for supper while he waits for a tow truck for his broken car. But the lost man has a plan. It's quite easy to see what kind of family this is, and that there is some tension between Kathy and her parents. So when he finds himself alone with the father, he convinces him that he is a good, religious and traditional guy, and that he would be perfect for Kathy. Convinced, Kathy's father offers him to stay on the farm, to Kathy's annoyance. Now that he gets to be close to her, it's his chance to try and change Kathy's mind, and make her fall for him as well..
So for this RP I was thinking of a family that is very traditional, religious, southern western American style. Kathy however is far more progressive, and if her father likes someone, then that's reason enough for her to hate him. But your character is smart and will convince the father to let him stick around, and then try to get Kathy. Kathy will resist you, but with her father's blessing, she can't chase you away or hurt you, so you can be quite insistent. While she will hate you at first, if you discover what turns her on, then perhaps eventually she will fall for you as well..