The Horse

Paul had decided to see what his sister was doing. He didn’t often visit her while she went for a ride on her horse, but today was a bit dull at home so off he went.
The stables where Tammi had her horse were about a mile from home. It was 3 acres just on the edge of the suburbs so the girls had plenty of places to ride around. There were ten horses there all owned by young girls between fifteen and eighteen. Tammi was just sixteen and Paul was fourteen.
When Paul arrived Tammi was washing her horse in the stable. He walked up to the building peering through the partly open door. Tammi was washing the horses rump with a soapy sponge. As he came closer, he slowed down when he saw her hand and sponge disappear under the horses tail. Paul stopped dead as he saw the horse lift up its tail exposing its virgina and his sister washing it repeatedly. Tammi was now doing more than just washing the mares virgina and ass hole, she was playing with it, rubbing it and following the folds of its flesh and rim of its ass. The horse seemed to give an approving soft neigh. Paul approached making some noise as he did, but Tammi just turned to see him and kept playing with the horse.
“Hi Tammi.”
Tammi was startled. Her brother had seen her. With no easy way to explain her way out she decided to just keep going. “Hi Paul, what are you doing here” she asked while inserting her fingers in the horses full cunt.
“It was dull at home so I thought I’d come and see you”, she now had four fingers in and out the horses now juicy vadge. Paul could see its black outer lips and its bright red inner lips with Tammi’s fingers opening and probing more and more.