While there have been several good suggestions, here's something else you could try.
When she finishes her rant, just stare at her. Slowly count to ten. Then start to laugh loudly.
Finish laughing, and look like your trying to say something. Point at her, gently, Then shake your head, laugh hysterically,and walk away.
If she comes running after you, laugh everytime she demands to know what's so funny. She'll get tired and offended and walk away.
When she finishes her rant, just stare at her. Slowly count to ten. Then start to laugh loudly.
Finish laughing, and look like your trying to say something. Point at her, gently, Then shake your head, laugh hysterically,and walk away.
If she comes running after you, laugh everytime she demands to know what's so funny. She'll get tired and offended and walk away.