Answer:
The birth of a son to James II
Step-by-step explanation:
The Glorious Revolution was the deposition of James II and VII, King of England, Ireland, and Scotland by his daughter Mary II and her husband William III of Orange.
Although he was catholic he became King with a lot of support because many feared that another war like the Three Kingdoms War would repeat. Although his catholicism they saw as a short-term reign because his daughter Mary was protestant and was the heir to the throne. But after an 11 years marriage without child James Francis Edward was born. As he was a boy he should be the presumptive heir before his sister Mary and that could be the beginning of a Catholic dynasty.
I hope this answer helps you.