Here are 2 Valentine’s Day cards by Ellen Clapsaddle. Both are posted 1918, 2 years before the 19th amendment was passed in America. The first one mentions woman’s sphere being in the home. Interested in learning more on this, I found the following blurb on http://www.ushistory.org-
“Money equaled status, and increased status opened more doors of opportunity for the upwardly mobile. The home was the perfect location to display the wealth. The husband had to be out in the public sphere creating the wealth, but his wife was free to manage the private sphere, the “women’s sphere.” Together, a successful husband and wife created a picture of perfect harmony.” The girl in the next 2nd card is wearing a sash that says “Votes for Women.” I wonder though why theses messages are on Valentine’s Day cards. The 2nd one makes more sense than the first as it actually mentions love on it.