Mine were all different.

DD1 waters broke about 2 hours contractions started. Was just a slow leak. I was in bed, but it was only a small patch on the bed, so I just washed everything.
DD2 waters were broken 10 minutes before birth. At hossy.
DS waters broke about half way through a 5 hour labour. I was awake this time & just went to lay down when I felt the pop. I jumped up, but a little bit got on the sheets. Again just washed everything (well MIL did...was at her house in BIL's bed!)

I used a maternity pad to hold it in. There was more with DS so I put a towel on the car seat as well, but that was enough thankfully