All of Heaven — Petra Nash

Miss Cecilia Avening was determined not to apply to her grandfather, the Earl of Syreford, even though at nineteen her future was uncertain. Required unexpectedly to help Marcus, Lord Ingesham with his three excitable nieces as they journeyed to London, Cecilia found the children were not about to let the acquaintance drop, which meant continued contact with Marcus. but he was considering the ladylike Miss Chadworth as his future wife, and a lowly governess surely and no place in such circumstances