Google 'ladies bike' and this is what Raleigh (yep, they still exist) suggest you buy. Low frame for your skirts, basket for tour handbag and PINK of course.
OK - they didn't have derailleurs in 1881 but have we really moved on?
Raleigh may not but thankfully the Anerley has. Admitting women (after a fierce battle) in the 1960s, long having a woman President and two of our strongest riders of recent times (Gina & Louise) graduated on to more challenging cycling.