Dad used to run a second hand shop for work and a lady had her waters break in the shop. He told her (jokingly) to leave quickly so yet couldn't charge for the baby. She was relieved by the light humor. Dad just got a bucket and mop and cleaned up. He also gave them a clean towel for the trip home.

I wouldn't worry about it. Although I have started to carry a towel in the car so I don't mess my car! Rofl