Katie, Anna, Helene Largmann

The German script states 'This is Katie and her other 2 daughters Anna and Helene.'

I have a wedding photo that I believe to be a younger version of Katie (Katherina/Katherine/Karolina). If I have correctly identified them, she married Franz Rooss? Largmann. Her maiden name might be Schwegel. It would appear that she married and stayed in Germany (photo was taken in Zweibrücken or Saargemünd) while the rest of her family settled in Millville, New Jersey and Philadelphia, Pennsylvania. Does anyone recognize her or the children?
People in photo include: Anna Largmann and Katie or Katherine Schwegel Largmann