Marriage Boot Camp: Reality Stars airs Fridays (9 p.m. ET) on WEtv

Michelle Money is learning the hard way that mistakes from your past never really go away.

In an exclusive sneak peek at Friday’s Marriage Boot Camp: Reality Stars, the Bachelor alum – who met boyfriend Cody Sattler on Bachelor in Paradise in 2014 is livid – when Sattler exposes her history of infidelity to the other couples.

When Sattler, 29, explains why he has trust issues with Money, 35, it comes out that she cheated – but not on him. She acknowledges stepping out “on a previous relationship – and he’s cheated too.”

Sattler adds, “She was married.”

For Money, this much disclosure is crossing the line (which, ahem, is pretty much the entire reason Marriage Boot Camp exists, no?), and they exit the group setting and get into a physical altercation.

In an interview, Money angrily tells Sattler: “I said, ‘Please do not bring up my ex-husband and my daughter.’ I said, ‘Promise me.’ ”

Sattler’s revelation clearly reignites underlying trust issues for the couple – who’ve been up and down since they met on BiP, dated for six months before announcing their split on social media in December 2014 and apparently rekindled their relationship a few months later – and Money tries to slam the door on Sattler before he grabs her by the shoulders as she strikes him with her knee and yells, “I hate you!”

Though they’ve tried to isolate themselves, the other cast members can overhear the loud arguing, and America’s Next Top Model winner Lisa D’Amato even heads upstairs to break up the fight.

But will she convince Money to continue on? Having her dirty laundry aired might be too much as she cries, “I can’t do this any more!”

Marriage Boot Camp: Reality Stars airs Fridays (9 p.m. ET) on WEtv.