Book: I chose Star Dust (Fly Me to the Moon #1) by Emma Barry and Genevieve Turner. The heroine is a single mom of two kids.
The mother of all writerly sins would be telling not showing, especially in romance. If the author keeps telling the reader that the couple is falling in love, but the reader doesn't see one example of that love and trusting building, then the romance fails. I want to look back on a book and remember scenes of action, conversation, and progress in the relationship, not paragraphs of the heroine or hero thinking to themselves that they are falling in love or having a side character say they are falling in love.