Jenelle Evans Has Nasty Exchange with Mom after Custody Case with David Eason

11:46 AM PT -- Jenelle and her mom, Barbara, just had a nasty little exchange outside the courthouse. Barbara insinuates the only reason Jenelle was hugging her daughter is for the cameras ... and Jenelle says Barbara -- who currently has custody of Ensley -- has blocked her number.

10:49 AM PT -- Jenelle just had an emotional moment with 2-year-old Ensley, hugging her daughter in the parking lot before Ensley left with Jenelle's mom, Barbara.

10:13 AM PT-- Jenelle and David just left court -- sans any of their kids -- we're told they were simply there to give the judge updates on their progress with parenting classes and couple's counseling.

Jenelle Evans and David Eason are back in court desperately trying to regain custody of their kids ... and at least one of the ex-'Teen Mom' star's kids was present.

Jenelle and David showed up together Tuesday to court in North Carolina in their ongoing Child Protective Services case ... but had nothing to say to our camera. As you know ... the troubled couple has been making court visits almost weekly since David shot and killed the family's dog.

Not long after Jenelle and David arrived, Jenelle's ex, Nathan Griffith, showed up with their 4-year-old son, Kaiser. It's unclear if any of Jenelle's other kids -- including 9-year-old Jace and 2-year-old Ensley -- made it to court.

As we first reported ... Jenelle and David enrolled in couples therapy in an attempt to get their kids back. David will also undergo a psych evaluation to determine what is at the core of his anger issues.

All of Jenelle's kids were removed after a judge decided there were serious issues with the couple that put the children at risk.