Lady Shay caught this guy checking out her ass and she knew that she had found someone to dominate and at whose expense she was going to have fun. So she teased him with her hot ass and when he got turned on, she controlled him. That is how she made him an ass worshipper as he had to do that to her and her ass. The mistress loved it.
Lady Shay wanted to reward her husband as he had been a wonderful husband. She did not want him to think she did not notice and that he was taken for granted. So she put on a show using her gorgeous ass to appreciate him. And she told him the purpose of it was because she wanted to let him know how special he was to her. She knew how much he adored her ass and she made it nastier than he had even enjoyed it.