Wife fucks her husband's best friend while he watches and masturbates

The cheating wife meets the husband's best friend to have sex, when they are in the middle of the sexual act, the cuckold husband appears watching his best friend fuck his wife, he gets so horny that he starts touching himself while watching his wife sucking her friend's dick and then the friend fucks her until he cums doggy style. Her cheating wife is a slut, but her husband loves to see her fuck other men.