In chap 46, Emma asked "Well, and how did Mr. Churchill take it?"

and Mrs Weston said --

"Most favourably for his nephew -- gave his consent with scarcely a difficulty. Conceive what the events of a week have done in that family! While poor Mrs. Churchill lived, I suppose there could not have been a hope, a chance, a possibility; but scarcely are her remains at rest in the family vault, than her husband is persuaded to act exactly opposite to what she would have required. What a blessing it is, when undue influence does not survive the grave! He gave his consent with very little persuasion."

Frank had been brought up by the Churchills, the property of Enscombe belonged to his uncle, but Mr Churchill had been very much under his wife's influence in her lifetime. Many years ago, it had been Mrs Churchill who had persuaded her husband that Mr Weston was not a good enough match for his sister. That was why Mr Weston was often bitter against Mrs Churchill -- re chap 36 --
"She was the instigator. Frank's mother would never have been slighted as she was but for her. Mr. Churchill has pride; but his pride is nothing to his wife's: his is a quiet, indolent, gentleman-like sort of pride that would harm nobody, and only make himself a little helpless and tiresome; but her pride is arrogance and insolence! And what inclines one less to bear, she has no fair pretence of family or blood. She was nobody when he married her, barely the daughter of a gentleman; but ever since her being turned into a Churchill she has out-Churchill'd them all in high and mighty claims: but in herself, I assure you, she is an upstart."