Doris was not included in the invitation.

"But anybody may ask a husband--or a wife--to lunch, separately.

That's understood.

I shan't do it often, however--that I can tell them!" And justified by this Spartan temper as to the future, he wrote a charming note, accepting the delights of the present, so full of epigram that the Cabinet Minister to whom it was addressed had no sooner read it than he consigned it instanter to his wife's collection of autographs.
Meanwhile Doris was occupied partly in soothing the injured feelings of Jane, and partly in smoothing out and inspecting her one evening frock.
She decided that it would take her a week to "do it up," and that she would do it herself.

"A week wasted!" she thought--"and all for nothing.
What do we want with Lady Dunstable! She'll flatter Arthur, and make him lazy.