Did the victors of he rebellion try to swipe what happened to Elia&kids under the rug? What is in WoIaF seems to be the official version of events,that the guilty are unknown,but everybody talks about Gregor. What might JonArryn have told the Martells? Did he try to sell them the same? Would make Oberyn’s“mummer’s show of an inquiry“more’fed up with bullshit’than mere impatience. Also gives the Dornish more reason to resent the new regime&secretly plan to overthrow it.

Well, with the highly significant caveat of Tywin’s “coverup” of who killed them and who gave the order, no. The bodies of the children were publicly displayed, the stories spread far and wide, etc.

Jon Arryn managed to make peace with the Martells, likely by emphasizing the chaos of the Sack of King’s Landing, that none of his own forces participated in the murders in question, and probably emphasizing that, with plenty of Starks murdered in Martell-adjacent locations, the Martells probably didn’t want to open that can of worms when they were so politically isolated.