The teetering stack of affidavits, emails, text messages, photos and home videos released this week by the U.S. Anti-Doping Agency to support its case against Lance Armstrong seems to make one thing unambiguously clear: Some of the most important figures on Armstrong's cycling teams were the riders' wives and girlfriends.

The 1,000 pages of documents made public Wednesday to support USADA's decision to ban Armstrong from competition for life and strip his titles included allegations that several wives or girlfriends knew...