You said what needed to be said; I would have done the same.
Most kids simply lack the cognitive skills to realize saying something like that is wrong. Even adults struggle with it sometimes. I would not worry about others "putting the pieces" together. My first thought was that the go-to reaction from others might be that you have a female relative who experienced this---as we all know---society still does not want to think it also happenes to males despite PSU et.al.
You did the right thing.
"His voice rose under the black smoke before the burning wreckage of the island; and infected by that emotion, the other little boys began to shake and sob too. And in the middle of them....Ralph wept for the end of innocence, the darkness of man’s heart…”. -----William Golding