Leah Messer & Jeremy Calvert's Romance Details! Is The 'Spark' Still There?

and Jeremy Calvert are finally realizing they need to figure things out!

On Monday night's episode of Teen Mom 2, the mother of three headed to Hawaii with her girls, which looked like a lot of fun, but she couldn't get her ex-husband out of her mind!

She was hoping that he would join in on the family vacation so they can spend some "alone" time together!

Watch the video above! Teen Mom 2 airs Tuesday nights at 8pm ET, only on MTV!