Jon then felt more bouncing, as Jack was now wandering outside. He came across a stray retriever bitch, who just happened to be in heat. Jack's cock protruded from its sheath.
He approached and then quickly mounted the female, humping furiously. Jon felt himself swinging back and forth, striking something soft. He felt a pressure build within him.
Soon, Jack's cock spurted into the bitch, but all Jon felt was a tremendous relief of pressure, as if he were suddenly drained. It occurred to him that Jack might be having sex. He hung there for a while, then began bouncing again as Jack trotted away.
Jon dreaded the possibility of being Jack's balls for two months.
