Heavy Rider for New Pony

The big, beautiful and heavy Amazon Goddess Samantha is searching for another new pony. She seems to wear them out and she truly wants a pony that can last under her full weight for as long as she desires. Some days, this might only be 20 minutes. Other days it might be two hours. She doesn't want to worry about whether her pony can handle her weight or not. She wants to ride with total power and freedom over her human horse. Today a young hopeful human pony has arrived for his audition to be Goddess Samantha's pony. She likes his muscular shoulders and arms and really puts him to the test with various exercises he must perform while she rides him full weight. The poor pony really starts to sweat and get exhausted under Goddess Samantha but he never quits. This impresses Goddess Samantha. Could he be the one she chooses?