I did say IF - and Caterina is pregnant. She's got a 50/50 chance of popping out a boy at this point in time... And also, that aside, I quote: "When Caterina arrives in England, her looks are considered unremarkable, so Henry VIII doesn’t issue the weird little piece of marital advice about not sharing his wife’s bed. But Tudor is as Tudor does, and sure enough, although Fitzroy dies on schedule, Caterina is pregnant. Five months later, she is delivered of a little son, named Henry for his late father. And unlike him and the Prince of Wales (son of Henry VIII and Jane Seymour), the little boy is absolutely healthy." Your own post, my dear...
Fair enough.I admit to not actually having planned this idea out, so my bad on that part.
Still, if Caterina plays her cards right, she could see her son included in the succession. I mean, Fitzroy's final illness was pretty sudden and while the common theory is that it was tuberculosis, I (and others) are not so sure. IIRC Caterina always kept the best medical staff around her - part of the reason she lived as long as she did - so what the English call "poisons" and "potions" etc could just as easily be remedies and the "sorcery" is medicine. I admit it IS a bit of a stretch, although I did read a book where an alt-ruling family of Florence (with an identical crest to the Medici OTL) are the de Chimici, and the "palle" on their CoAs are representative of pills - although the other symbol of the family is a glass with a snake wrapped around the stem), so Caterina refusing Henry VIII's physicians in favour of her own Italian ones seems possible.