How Can I Stop My Married Son Having Two Children From Gambling And Other Bad Habits?

It's a difficult question to answer because your son is an adult.
You must be very distressed to see what he's doing, especially as there are children involved.
You can try talking to him and telling him how upset and hurt you are to see him acting like this and the effect it's having on your whole family. He might tell you to mind your own business but that's a risk you have to take.
tell him that if he doesn't care about himself, he's being cruel to his children and this might get through to him.
If he's gambling then the family will suffer as he wastes money on this and other bad habits .
If his behaviour deteriorates even further he may risk intervention by social services if his children are not cared for as this will be putting a strain on his marriage.
He needs help from groups who help people with gambling problems. The real problem is making accept he has a problem, once you've done this he's on the way to seeking help which he might be glad of.

It is always very painful and hurting that someone's child specially married one to get involved in bad practice like gambling, drinking and others. I would like to suggest you to take following steps to stop him from these bad practices.

First of all teach him the basic ethics of life that how to spend life according to the norms of society, religious aspects and other family pressures. Mind it the pressures should be very strong either from the family members, friends, relatives or as well as the society. His acts should be very badly rejected and disliked. This would definitely prick his conscience and he would start realizing that he is doing something wrong which is not appreciate able by the relatives as well as society.

Secondly I think it is better to check all his financial aspects. All his incomes either from the job or from the business should be taken into control or utilized properly according to the needs of his elders and his family. Your son should be provided only those expenses, which are badly needed or required. He should not have any surplus money to get involved again in bad means and practices. I think if you act upon above-mentioned acts it will easy to control the bad habits of your son like gambling.

The first thing to do is to figure out the reason for your son having the bad habits. When you have found the reason why he is indulging in these habits you can move forward and find a way to remove these reasons which lead him to gambling and other bad habits.
The expert's advice that one should start by making small goals and achieving them. If you want your son to get rid of gambling first a small goal has to be achieved and please keep in mind that don't be discouraged if you fail in the beginning. Don't start thinking negative if you are not able to help him at the first step, it takes some time.
You should encourage him to stay away from the people, actions and environment associated with his bad habits. Try to engage your son in doing constructive and meaningful activities; these will help him keep his mind off the bad habits.
One of the most important things is that he should have a support system of family and friends around him when he is trying to overcome the bad habits, who encourage and support him.
Last but not the least that he should keep on persevering as breaking these habits takes time, it will be a big change so he should not lose hope easily.

We all know what the consequences in our bad behaviour, but what my suggestion is: let your son know that he has a problem. Let him know (in a nice way, so as not to embarrass him) privately, (so that he will see that you mean what your saying) that he has to stop and (don't say grow up because bad habit or addition is a disease of the brain and emotions) discipline himself. Tell him that this problem is not needed in his life right now or any other time.

Ask him if he wants to stop, but can't. If he say yes, then he has to bar access to his own money and let it be managed by someone else. He can manage it through paper only, but he shouldn't be able to touch it. Time will come that he will know he is cured when he does not have craving or urge to go and gamble. The problem is to get rid of the urge and if he doesn't have way/ or access in his credit card or ATM or cash, only then he will be stopped.

Also, he should be willing so that he could be able.