Finessing Clarissa - M. C. Beaton

'If you have a Wild, Unruly, or Undisciplined Daugher, two Ladies of Genteel Birth offer to Bring Out said Daughter and Refine what may have seemed Unrefinable.
We can make the Best of the Worst'

When Amy and Effie Tribble, two charming but impoverished spinster sisters, lose out on an inheritance, they place this advertisement in The Morning Post and hire themselves out as professional chaperones.
Vowing to prepare even the most difficult misses for marriage, the Tribble sisters will spend a London season on each client, educating them in their School for Manners.

Lovely, wealthy and well bred, Clarissa Vevian has been unable to find a suitable husband because of her terrible clumsiness.
Her petite and fastidious mother has tried to mould Clarissa into a dainty miss to fit the fashion - but all her efforts are doomed to failure. And when Clarissa enters the Tribble sister's home, they fear that their reputation for matchmaking success may be destroyed - along with their carpets and furniture!