Elise Sutton. I really like his boots! The marks on his ass are pretty appealing too, but his pony tail... tsk tsk! Didn't anyone ever tell you to brush your pony?
Nice stirrups too, actually... this would be a pretty nice set up for those into carrying their riders on their hands and knees. It actually looks fairly comfortable for her. Bet the carpet's none to nice on his knees though!