Very interesting. If I were a judge, her admission to lying about anything would be of interest especially if she is claiming you are abusive. Hmmmmm.
As for tactic, DENIAL, DENIAL, DENIAL. Seems logical if she was taking a bath in mouthwash and perfume. It makes her look less bad in her warped mind. I also think that she could be trying to give some admission ANY admission so you don't bring it up in divorce proceedings. "Oh, she was smoking, so I won't bring up the rest of the stuff because NOW she has told the truth." LOL!