It didn't explode so much as it reached maximum capacity and leaked all over her toosh, her clothes, and the sofa cushion.
What's a Domestic Know-How girl to do? Well, the first step is to pull the cushion off the couch and then blot, blot, blot. Pour some rubbing alcohol over the stain. Let it sit for 5 minutes or so.
Ahem. Then blot again. Final piece of the puzzle? Take the cushion out to the back patio (not the front, can't have the neighbors talking about the ugly, outdated couch) and let it dry in the sun. The sun will kill any bacterial beasties the alcohol didn't obliterate and will leave said ugly cushion smelling much better than it looks.