yeah, he really might have but I don't think he did. This author seems to be a full disclosure one; she told us about Roger's parents and his whole history. Although she never told us what was in the letter. And Reno doesn't seem to have a history at all; yup he might have been raped after all.
I now has lost count on how many time I have read this manga, I still keep crying oh and did Reno really get rape? But he said that he doesnt...