He's just having a good time! At least that's what David Eason thought when he posted an Instagram video of his stepson, Kaiser Griffith, running around on a moving boat on Tuesday, July 3.

"Kaiser is so funny, he keeps us smiling and laughing all the time! You couldn't ask for a better kid. Kaiser is more active than the rest and tends to be a little clumsy but he is a bruiser and nothing stops him when he is having a good time!" the Teen Mom star captioned the clip of wife Jenelle Evans' four-year-old son with her ex Nathan Griffith.

https://www.instagram.com/p/BkxCXCmB5UV/

But Jenelle's husband's nearly 400,000 followers weren't exactly amused. "Who in the hell lets their kids run around like that on a moving boat with a baby?? And why is that baby running around??" one fan wrote. Another shared, "It must be so hard for them to literally have to watch every single little thing they do with those kids like exhausting."

However, some fans took to the comments to defend David. "So cute… whatever you do don’t read these posts hahaha people are nasty to others that they think they know and just judge," one said. Another shared, "Awe they look so happy! You guys got some cute kiddos. Why do people have to be so negative!" One commented, "Clearly all the haters are jealous of there own loveless lives they have to pick holes in everyone else I feel for them it must be hard being so negative sending love and light to these troubled souls."

This post comes amid the rumored custody battle between Jenelle and Nathan's mother Doris Davidson after she accused David of abusing the young boy. David and Jenelle are parents to a one-year-old daughter Ensley together. Jenelle also welcomed son Jace in 2009 with her ex Andrew Lewis and David has two kids Maryssa and Kaden from a previous relationship.

Love Teen Mom? Be sure to join our Teen Mom Facebook group to chat about all the latest updates and juicy gossip!