Another time she thought of all the terrible things she would do, how difficult she would make it for any other woman who invaded her preserves.

However, she was not sure.
Would she declare war if she discovered another?
She knew she would eventually; and yet she knew, too, that if she did, and Cowperwood were set in his passion, thoroughly alienated, it would do no good.

It would be terrible, but what could she do to win him back?
That was the issue.

Once warned, however, by her suspicious questioning, Cowperwood was more mechanically attentive than ever.

He did his best to conceal his altered mood--his enthusiasms for Mrs.Sohlberg, his interest in Antoinette Nowak--and this helped somewhat.
But finally there was a detectable change.