Kailyn Lowry & Javi Marroquin Finally Tell All About Their Steamy Hookup!

Finally...the details that Teen Mom 2 fans have been waiting to hear!

In a sneak peek clip for Monday night's reunion, Kailyn Lowry and Javi Marroquin sit down with Dr. Drew to discuss their rocky relationship. "You guys had hooked up, right?," Dr. Drew asked the former spouses that looked at him with blank stares.

Back in early June, Kailyn opened up about hooking up with her ex-husband again and the regret that she felt. "Javi & I talked about getting back together at one point. Why? I don’t know because we both knew we didn’t want to & it would never work,” she revealed. “I regret even having those conversations. I regret filming about it. And hooking up w him as I know people from the reunion leaked that," she tweeted.

Watch the clip above! Teen Mom 2 airs Monday nights at 9pm ET, only on MTV!