When Valerie told Joe that she was NOC, they were only dating. On April 3, 1998, Plame became the third wife of former Ambassador Joseph C. Wilson IV. Plame met Wilson, her second husband, at a Washington D.C party in early 1997. She was able to reveal her CIA role to him while they were dating because he held a high-level security clearance. At the time, Wilson was separated from his second wife Jacqueline, a former French diplomat. Wilson and Plame are the parents of five-year-old twins.
More leaks in Wilson's boat...
"She was able to reveal her CIA role to him while they were dating because he held a high-level security clearance."
No. This sort of stuff is on a need to know basis. You can go blathering about your work just because someone else has some form of clearance from another government agency. Clearance at the CIA and at the State department are entirely separate matters, i.e. someone who worked at the State department but later decided to shift careers and become a CIA agent would have to go through a much more thorough and invasive clearance process with the CIA before being hired.