Her brother Henry married their brother Arthur's widow Catherine of Aragon, but when he grew tired of her in 1533 after she only bore the Duke of York a daughter Mary, the Queen refused to have him annul his marriage. He took a series of mistresses, first Anne Boleyn with who he had an illegitimate daughter Elizabeth. Catherine died in 1536 and the Prince remarried to Jane Seymour who bore him a son Edward but she died in childbirth. He found a third wife in Anne of Cleeves but she was not as attractive as her portrait portrayed her but again the Queen refused to annul the marriage. He took in turn two more mistresses Catherine Howard, the cousin of his previous mistress Anne Boleyn, and Catherine Parr who it is said he was most happy with.
Scenario one After Henry VII, Queen Margaret I (Apr 1509- Oct 1541), James I of England and V of Scotland (Oct 1541- Dec 1542), Queen Mary (Dec 1542- Mar 1602*), King James II and VI of Scotland, Queen Elizabeth I (Mar 1925- Feb 1662), King Charles I (see below) ( Feb 1662- Aug 1680), King Charles II (Aug 1860- May 1865), Queen Elizabeth II (May 1865- Dec 1722), King Philip I (Dec 1722- Dec 1723), Queen Louise I (Dec 1723- Feb 1743), Queen Charlotte (Feb 1743- Jan 1761), King Louis (Jan 1761- May 1768), Queen Louise II (May 1768- Jun 1821), King Louis Philippe I of UK and France (Jun 1821- Aug 1850), King Philip II (Aug 1850- Sep 1894), Queen Amelie (Sep 1894- Oct 1951), Queen Margaret II (Oct 1951 - Present)
|The woman who's diamond Jubilee we could have been celebrating on Tuesday|
Scenario two after James I, Queen Elizabeth II (Mar 1925- Feb 1662), King Charles I (see above) ( Feb 1662- Aug 1680), King Charles II (Aug 1860- May 1865), Queen Elizabeth III (May 1865- Dec 1722), King Philip II** (Dec 1722- Dec 1723), Queen Louise I (Dec 1723- Feb 1743), Queen Charlotte (Feb 1743- Jan 1761), King Louis (Jan 1761- May 1768), Queen Louise II (May 1768- Jun 1821), King Louis Philippe I of UK and France (Jun 1821- Aug 1850), King Philip III (Aug 1850- Sep 1894), Queen Amelie (Sep 1894- Oct 1951), Queen Margaret (Oct 1951 - Present)
|Queen Victoria II?|
Scenario three after Victoria, Queen Victoria II (Jan-Aug 1901), King William V (Aug 1901-Jun 1941), King William VI (Jun 1941-July 1951), Queen Felicitas (July 1951- Aug 2009), Queen Frederica (2009-present)
All three of these ladies were the oldest surviving child when their reigning parent died and as you can see there are interesting twists to history that would have been the outcome, not just to the history of the Royal Family but to the UK and Europe as a whole.
* Of course without Elizabeth being a legitimate threat to the Mary she is not executed and lives to the age of 60.
** Of course Queen Mary Henry VIII's daughter married Philip of Spain and her titles were his for the term of their marriage, making him King Philip of England, hence in this time like the first Philip who is an heir has the second regnal number.
Further reading If you like slants on actual geo-political history I can recommend Prime Minister Portillo: and Other Things that Never Happened (2004) edited by Duncan Brack and Iain Dale. But I also have just seen there are follow ups also edited by Duncan of counter factuals President Gore: and Other Things that Never Happened and Prime Minister Boris: and Other Things that Never Happened. I'm sure a fourth volume will have to include will have to include a chapter, if not be the title "Queen Victoria II: and Other Things that Never Happened" looking at the issue of gender neutral primogeniture well Duncan you know where you can find me to contribute that chapter.