Interior Designing

I finally hung curtains in our living room, it's okay to nail them to the windowsill right?

I didn't have a long enough curtain rod and I didn't want to buy one so they got nailed up. They look awesome until you notice the left side where I needed about 3 inches more curtain so I had to hang a third panel. I nailed the three inches and the rest is just hanging... they look awesome from outside, really.
L