"That's it, Glen," she panted, "fuck it to me good and hard, honey."
Terry glanced at her parents and knew that her daring experiment had been a total success. She'd wanted to liberate her whole family from their puritanical ideas about sex, and she'd done it. She was amazed at how easy it had been. But then maybe they were all just waiting for somebody to come along and give them, an excuse to have fun.
"Ohhhhh, God, ohhhh, I'm coming!" Irene howled.
"Take my come, baby, aaaggghhh!" Glen roared.
Their kids came right along with them, and the whole family climaxed together, filling the room with their moans and yelps. Yes, Terry's naughty experiment had been a success beyond her wildest dreams. She certainly wasn't going to be bored this summer, and neither were her parents and brothers.
"Hey, whose idea was all this, anyway?" Glen laughed as they finally stopped coming.
"Terry's," Irene smiled. "She started it all."
"Honey," Glen leered at his daughter, "you have a real naughty imagination and we love it."