Mistress Ava Black knew her ex loved her ass to bits. She used it to tease him. He was hooked and he wanted to have her but she had tied him to a chair and she drove him wild with her naughty actions. But instead of riding him and fucking him, she teased and denied him. He begged and even promised her money to do it but she did not.
This mistress knew that her slave had not had sex in a long time. He had been a good slave to her and she wanted to reward him. She did this by teasing him. She showed off her sexy ass, she rubbed her pussy and she showed him how she wanted to ride his dick and turned him on. But instead of fucking him, she made him jerk off to satisfy himself.
Mistress Ava Black found her friend mistress Kitty was sad and she wanted to cheer her up. So she took her to her house and she called a slave. She made the slave lick mistress Kitty's butt. She found it weird but as they humiliated and teased and denied the slave, she began to have fun and she soon forgot about what had made her sad. The mistresses dominated the slave cruelly before they let him go.
When this mistress realized that guys dig her ass, she knew she had found a way to have fun at the expense of guys she did not like. How she does it is that she gets to tease them and turn them on using her ass. And when she is sure that they are turned on, she makes them do what she wants and then she leaves them high and dry by teasing and denying them.