Yes, she had known from the very first that her daydream of a marriage has been arranged and the weddingbells ringing for Mrs Reggy Wylie T. C. D. (because the one who married the elder brother would be Mrs Wylie) and in the fashionable intelligence Mrs Gertrude Wylie was wearing a sumptuous confection of grey trimmed with expensive blue fox was not to be.
There are no more uses of "sumptuous" in the book.
Show samples from other sources
It’s August, so sumptuous that I couldn’t bear any more black squares, but no, it’s been nothing but hearts, Nick acting like my husband, sweet and loving and goofy.
Gillian Flynn -- Gone Girl
Cinder cast one more look at her stepsisters’ sumptuous gowns before backing out of the room.