It is a "real life" tagged serial/novel, if I recall correctly. It takes place in England. A fellow comes home from work early and finds his wife in bed with another man. He heads off, after leaving a note saying he'd be filing for divorce. He decides at this point that he's going to transition permanently at this point.

She drives off and her car breaks down near a small seaside village. She starts making friends and falls head over heels for this woman living alone in the village who has a number of cats.

Eventually, her sister's family moves to the village as well. Her father-in-law tries to interfere with her settling in the village and ends up going to jail for something.

She's always wanted to be an artist, I think. Or, a bookseller and the woman with the cats is the artist.

I can't remember who wrote this, and I didn't get anything from searches that matched.

Anyone recognize it from what I've described?