Sandra is looking for this one! Almost sounds *a bit* like All the Ugly and Wonderful Things (here’s my Book Review) but not quite. Similar premise though (although All the Ugly and Wonderful Things is extremely forbidden in regards to the relationship that develops).
She asks:
Looking for book
I am looking for a biker romance about an older biker that saves a little girl thats sick then he goes to prison and they write each other.
Then she grows up to love him then gets a job at his bar