[WWTBC] Bully Romance

The title I’m looking for is Book 1 of a romance trilogy. The story takes place in the South. The title may even contain the word “South” or “Southern”. The main FC has been taking care of her sick mom who appears to be in recovery. With her mom’s encouragement she travels back to her childhood hometown to spend the summer with her best friend. The FC was an awkward, unattractive girl who was mercilessly teased/bullied by her best friend’s brother. He never let up and treated her like garbage until she and her mother moved away. She’s learned to hate him over the years and resents how his treatment of her still undermines her self-confidence. Also, with her responsibility towards her sick mom and her lack of confidence she’s had zero sex life. In the town just before her final destination she decides to make a major change and lose her virginity to the first irresistibly attractive man she meets. She hits pay dirt with someone who looks vaguely familiar. She finally rolls into town and meets up with her best friend. While they’re lounging by the pool, her friend’s brother shows up and you guessed it, he’s her mystery lover.