Bethenny shares a damaging secret about Luann's relationship with some of the ladies. Out on the town Luann continues to gloat about her engagement, while Bethenny and Sonja do some undercover work and make a confrontational phone call. Once again Dorinda's plans for the group don't work out as the ladies split up for the day, causing frustrations to surface at dinner. The final morning in Miami opens the door for an upsetting conversation that leaves Bethenny no choice but to share this scandalous secret to the person it could hurt the most.