Give the wife and child a command to teach the dog and watch them do it until he follows the commands the tough part is keeping quiet but if they get flustered they might step up their game a bit.

My wife is to nice to our beagle the dog gets away with a lot more when I’m not around but she’s a hound if your not watching her every minute she’s off chasing rabbits.

All great advice. I had a talk about dominance recently.
Recently my boys left the garage open while they were playing. The hound went out trailing and the youngest couldn't get her back. 1 whistle from me and she was running home (6 houses down). Neighbors down the road were impressed and they never seen anything like that. They said my youngest was trying hard to get her and always see owners looking for their dogs and can't ever get ther dogs to runback home. I explained I'm the alpha and lots of time with her establishing that fact.

My youngest asked how I did that. I explained to him even though he is dominant over Joy (hound), Joy knows the pecking order. I suggested to him spend more time with her being more authoritative, having fun and she will act the same way with him.

The kids can get her under control most of the time except when she's off leash trailing.

obedience class always starts with walk , sit on leash for everything usually with a pocket of treats and a pinch collar

and progresses to sit stay

down

leave it take it

leave it on a sit stay

sit stay going farther and farther away

from down to down and let you roll them over like the vet is going to draw blood

feed in the morning train in the evening , no food till after training

Wish you the best in training him. GCP we as a society probably need to do the same to a lot of kids/adults as well. If they get in trouble a few times give em a bullet. That would stop a lot of problems we currently have and be a money saver. Dang laws won't allow it though. That's somewhat sarcastic but truthful at the same time.
I like most dogs better than most people.

Many times family members over praise or praise a dog for doing nothing. The dog almost always ends up ignoring them.

Also, be sure to tell them to never ask the dog to do something that they do not intend to enforce on the first command. Every time. Sit and stay at meal time goes a long way. It’s every day and their is a reword for listening.

As others have said they have to know who is the boss. My brother has an 8 month old lab, she is an extremely energetic, but very intelligent pup. That pup listens to everyone but my Mom, I can take the dog out off leash and she listens and follows and I have not spent any training time with her. My mom on the other hand has to take her out on a leash because she doesnt listen to her. But mom is a push over and talks to the dog like shes a baby. And when told why the dog doesnt listen she says she cant do that its mean.

that is a slippery slope and always seems to go wrong for the wrong people
eugenics , gynecide , forced lobotomies , forced sterilization

if your killed during the commission of your crime by your victim it is another thing , that is what criminals need to fear.

it is a different thing when your cutting your losses on property you don't want to have to do it. too many people won't take responsibility for anything just toss it back out into the world for some one else to deal with.

if you raised a really rotten kid chances are you were bad yourself , lots of evidence to that around.

My wife does this as well but that doesn't get the Lab to listen to her the way he should. She uses the wrong commands for the dog. For instance my dog does not know the word "sit". She says this to him all the time. "Sit" is a hand command. She uses the word "come" often. This is also the wrong command for the dog. Simply saying the dogs name is the "come" command. All family members need to be on the same page with a dog that has the skills but doesn't listen to everyone equally. Corrections and consequences need to be the same as well.

Here is another example... When I call the dog if he does not respond IMMEDIATELY I give him the buzzer on the collar. I then go straight though the progression of corrections on the collar until I get the response. The wife will call the dog (using the wrong command most of the time) and only after many attempts give him the buzzer. Multiple attempts again and then she starts the progression of corrections. I can't remember the last time that I have had to use even the buzzer to get the appropriate response immediately.

Slydog make sure to stick that "kennel" response. One of the most important behaviors for the dog to be spot on with. It works anywhere. I use it in the duck blind, in the field, and in the house. If someone comes to the door and either knocks or rings the doorbell the dog goes straight to his bed and stays there until someone lets him off. Test him regularly on only using any method other than the correct one. The dog should never leave "kennel" until someone comes to get him/her.

If you don't have it I would highly suggest Tom Dokkens Retriever Training book.