I don't believe so. She wrote a strange little crossover fic which you can find on her website, where Adam, from her Cyclone series travels back in time and meets Free, and the implication there is that there is a different timeline. This was originally intended to be out of continuity with both series, but I'm not sure it still is...

Certainly, Milan heavily implied in her afternote to Once Upon a Marquess that she was plotting some fairly drastic changes to the political timeline, and we already know that women got the vote in 1895 in Free's universe.

(PS: The fic is here: http://www.courtneymilan.com/adammeetsfree.php - but there really isn't much point reading it until you've met Adam, at least. Free, I understand you know a little already...)