The strangest thing about the article is that it concludes by saying that Lance won the 1993 world champs and 1996(?) La Fleche Wallonne, as if the latter rated in his cycling career.
His son was 18 with a girlfriend of 16 at the time and they'd been going out for months, so it falls under the Romeo and Juliet exception unless she was severely under the influence. Now, if you read the newish Malcolm Gladwell book, it indicates that 'blackouts' due to excessive alcohol may not impede functioning enough to be particularly noticeable, except that the person does not remember anything that happened during that time. The Stanford Brock Turner case was another one. In the latter, he was extremely drunk as well and the initial police report indicated that he could not remember what he had done during that time (his words, while later on he claimed to have known what was going on), so there both people apparently had 'blacked out.' In this case, it might turn out to be assault but it might also turn out that neither knew or that the girl was blacked out in the sense of having memory loss but functioning as if she was aware and that Armstrong's son didn't realize that. But that's all for the courts.