Charly (2007)

Nicolas, an aimless adolescent who hasn't yet found his way in life leaves his grandparent's home, hitchhikes to a small town, and befriends, Charly an outspoken and slightly older prostitute, a red-headed beauty who appears to ply her trade in the same no-nonsense way she clears the breakfast dishes. She seems to find something endearing about Nicolas' mussed hair and dopey face, so she puts him up in the teeny trailer home that she maintains with such hilarious fussiness. As their unusual domestic arrangement evolves, each stumbles vulnerably into new emotional territory.

Unfortunately the movie Charly is not yet available on HBO Max.