A former Adriana Furs employee testified yesterday in the trial of former Washington Teachers Union officials, identifying five fur coats that she said defendant Gwendolyn M. Hemphill or family members purchased. "She didn't want her husband to know she was buying a fur coat," said Aki Shabani of the first purchase in 1999 -- a full-length mink coat worth about $4,096, which had Mrs. Hemphill's name monogrammed on the inside. Mrs. Hemphill, 63, a former officer manager, and former union Treasurer James O. Baxter II, 50, are charged with conspiracy and aiding and abetting in the theft of nearly $5...