Ouch?

In an exclusive sneak peek clip for Marriage Boot Camp Reality Stars: Family Edition, Amber Portwood leaves her co-stars furious after she exposed a dark secret that she learned!

But then, the tables turn after her co-stars tell her that her now ex-fiancé, Matt Baier, exposed her drug usage.

Watch the jaw dropping clip above! Marriage Boot Camp Reality Stars: Family Edition airs Friday nights at 9pm ET, only on MTV!