Roller Skating

Yesterday afternoon around 4 pm I noticed the daughter coming outside with rollerblades and knee/elbow pads. Except on closer inspection it wasn't rollerblades but good old-fashioned roller skates. She spent time practicing reversing direction up and down their driveway. I realized that there were a bunch of white marks from her braking. Since she was all in black with the dred-locks, I wonder if she is part of a local roller derby team. This seems a lot more likely than her just casually skating down the bike path. It's a fairly combative sport. The other question is what does she do that she is home in the late afternoon (I was out 'sick')? I think she works in writing, but maybe I'm confusing her with her boyfriend Steve who I know is a writer.