Here is her marriage 'allegation' from findmypast. It was a form of marriage license and specifies the parish for both parties but it doesn't mean she was married twice.
Interestingly they have an image of the document and it's a printed, standardized form with the relevant details filled in. I've never seen one from so early before. There's no additional info on the image.
There's one anomaly on the document: Francis Stones is said to be of the parish of Wirksworth in the County of Derby, but Margaret is 'of the parish of St Nicholas in the town of County of Nottingham'. The name for a town is just missing. However further down is specifies 'the Parish Church of Wirksworth or Kirksireton'. I presume Kirksireton is 'Kirk Ireton' today, and it's just a few miles from Wirksworth, but it seems to imply that Margaret was living somewhere else as they're nowhere near the border with Nottinghamshire.
Edit: I think the 'missing' town was just their way of writing 'Nottingham in the County of Nottingham'. I found her younger brother's baptism in St Nicholas, Nottingham in 1709 - which I see you already knew about.
First name(s) Margaret
Last name Ridgeway
Birth year 1706
Marriage year 1730
Marriage year as transcribed 1730
Marriage date 14 Jun 1730
Marriage place Wirksworth
Marriage Place 1 Wirksworth
Marriage Place 2 Kirksireton
Residence parish St Nicholas
Residence county Nottingham
Spouse's first name(s) Francis
Spouse's last name Stones
Spouse's age 30
Spouse's birth year 1700
Spouse's status B
Spouse's residence parish Wirksworth
Spouse's residence county Derby
Record set Staffordshire, Dioceses Of Lichfield & Coventry Marriage Allegations And Bonds, 1636-1893