The Bound Wives Club 3 - Bondage MILF BDSM Club, #3

Zack, Jeff and Brian had a great thing going. Once a month one of them would tie and blindfold his wife while one of the others had his way with her. Once Diane finds out about it, however, she forces her way into their group. The guys agreed to let her continue in the club on one condition: she needs to seduce Zack's wife into a consensual sex act - if she can pull that off, they'll let her play along when they blindfold Barb - otherwise, she's out for good.
Zack's wife is straight as an arrow - surely Diane will fail in her attempts at seduction...