The Pincus connection is interesting. Pincus knows as much about CIA matters as any reporter in Washington and would've certainly known his friend Wilson's wife was with CIA. Anyone Pincus talked to about it would've also known.
I think at the time of Clinton's Africa trip Wilson was still married to his second wife Jacqueline, but was already seeing Valerie Plame. He met Plame in February 1997 and divorced Jacqueline in 1998. Wilson worked for Clinton on Africa affairs from July 1997 to July 1998. What is the date of the picture, and does it show Jacqueline or Valerie?