no, I don't think there was any retcon
but the role of the attempted rape was only to create the reason for the confrontation with Jaye and MC's departure.
once that purpose was exhausted, in my opinion essentially to ensure Jaye's "purity", it was de-emphasized by a lot, which in absolute is perfectly consistent with the narrative: how could Jaye, and Tara who knows practically everything about her friend, have talked so calmly with a guy who had recently attempted to rape her? that scene, the first time, looks really weird, later it makes sense. (If we really want to, the trap scene on the boat appears even more artificial, but that's a minor problem.)
Jaye basically says that Christian's was a desperate act, for which she never really felt in danger
but despite that , for fans Christian will still remain a rapist, the one who tried to rape Jaye, and for that he will never have forgiveness. but it seems to me the story goes in another direction. Christian is the only friendly face, who knows something about what the real antagonists want to do, and sooner or later he will be heard (I haven't finished the last chapter yet, so I don't know if there have been any major developments yet)