She was shocked as she realized that...

"But not without a shock to her sense of maternal propriety did the english matron of old-fashioned ideas see, or hear of, her daughter being twirled round in the arms of some youth just introduced, or perhaps without even the preliminary of that easy form."

from: http://www.victorianlondon.org/entertainment/...

"Not without a shock did she (have to) realize that ..."

wäre wohl die üblichste Form

Or ...to see...

dude's learn is good as long as "she" is being apprised of / told something, rather than clapping eyes on it herself.