They Called Me Pimp. They Called Me Pimp, #1

They Called Me Pimp is about Miss Puurrsia - overweight, middle-aged, driving a minivan by day - who builds an escort agency out of pure desperation and turns it into the safest, most profitable operation in the city, run more like a family business than a hustle. But success draws the wrong kind of attention: rival pimps who want her gone, a rival agency undercutting her from inside her own circle, and one of her most trusted girls running from a trafficking past that was never actually finished with her.
It's book one of a series, and it ends with proof that somebody's been watching all of them the entire time.