Turtles, turtles everywhere

Last night we saw a painted turtle laying eggs. She was digging a muddy hole with her back legs. We spotted her easily since she was right in the middle of the road. We watched her for a few minutes, then left her alone.
We drove along near what I call the "Loon pond" and saw yet another turtle. This one was on her way back to the pond after laying eggs. We could tell because she had fresh mud on her back legs and shell. We not find her nest.
When we finished looking around the prairie, we went back to where we saw the first turtle. She was gone, but we could see where she buried her eggs.
Now we'll watch over her nest for the next 10 weeks.
Painted turtles mate between May and July and usually lay 2 sets of eggs. I wonder if it is coincidence or if there is a reason we saw 2 last night. Temperatures are hot now after a cool spring and we have had some rain after a dry spring. Whatever the reason, it sure has been fun!