I haven't read it but I know it's by a popular author and I have it somewhere on Mt. TBR.
She had a crush on H as a teenager. There's an age gap but not too big, I don't think. She had a baby when she was 17/18, not the H's. Her son is 7ish, I think, when the book starts. She starts working with the H (and her father?) and their relationship progresses.