Maude (Matilda) (Throckmorton) Greene - Relationships?

According to Genealogics, she m. 2) Richard Middleton of Great Linford, Bucks, MP, and Anne Grey, of Greens Norton was a Green, not a Middleton.

I’ve disconnected Richard ‘of Spofforth’ Middleton as husband & also the speculative son John Greene, Esq.

Reference:

1. https://www.genealogics.org/getperson.php?personID=I00140922&tree=LEO cites
   1. [S00403] The Royal Lineage of Our Noble and Gentle Families, London, 1884, Foster, Joseph. 36
   2. [S00119] The Lineage and Ancestry of H.R.H. Prince Charles, Prince of Wales, Edinburgh, 1977, Paget, Gerald. O 26632
   3. [S04666] A Genealogical and Historical Account of the Throckmorton Family. 1930 , Throckmorton, C. Wickliffe. 49

https://groups.google.com/g/soc.genealogy.medieval/c/iLY6XjNllE8

I have Richard Middleton of Great Linford in my database with a death date of 14 November 1489. He married by 1464, Maud Throckmorton (died by 1499), daughter of Sir John Throckmorton of Coughton (c.1382-1445) & Eleanor Spine, and widow of Sir Thomas Greene of Greens Norton (c.1427-1462).

Richard Middleton was a younger son of Sir John Middleton of Belsay Castle, Northumberland (c.1373-1441) and his wife, Joan Skelton (d. 1450). There is a bio for this Richard Middleton of Great Linford in Wedgwood's HOP

Added Richard Middleton of Great Linford

I’m still unclear about parents of Anne Grey, of Greens Norton - most have her as a Middleton.