There's something i've always wondered about your story. Why didn't lucerra son coryls marry jaehaera? Logically it makes a lot of sense to truly tie in the blacks and greens claims by them.
A few reasons: One, Jaehaera is eight years older than him, and that would be a massive wait for their marriage, about 16-17 years (Jaehaera would be 26 by then). Two, Corlys is already engaged from early infancy to Ellaria Martell to bring Dorne to the Black's side and unite the Seven Kingdoms. Three, Corlys is Aegon's heir when he dies, not Jaehaera; Aegon and Lucerra's marriage technically ended the war. And finally, the marriage would be a waste: Lucerra is skilled in political matchmaking, and in the nicest way possible, Jaehaera has no marriageable value within the crown. She's already her stepdaughter; none of the Green's supporters would support her claim as a woman.
There's really not the same post-war politics, because instead of a twelve-year-old King, they have Rhaenyra and her competent loyal council, there wouldn't be a green claim, and thus Jaehaera has no point marrying the future king.