Basically, what if Margaret Beaufort was able/did have more children after Henry VII. She might have maybe three living children with Henry Stafford and maybe one or two with Thomas Stanley. Here's what I thought:
1- Henry VII of England (b.1457)
2- Anne Stafford (b.1460)
3- Humphrey Stafford (b.1464)
4- Joan Stafford (b.1469)
5- Thomas Stanley (b.1473)
What happens to them? Would Humphrey Stafford/his descendants receive the Dukedom of Buckingham after the execution of Henry Stafford? Where would the children be married off to? Does the presence of these extra children diminish the chances of Henry VII even happening? Is it possible Anne or Joan Stafford, with royal blood on both sides, are married to Edward V?