You should talk to your partner about the problem, and you should calmly talk to them about the consequences of their issue. Most of the time, the person would know that they are afflicted, but they do not know what the consequences are and how it is going to affect their lives. Their judgement is certainly clouded because of the addiction. Make sure that you talk to them when both of you are in a calm mental state. You should never speak about such important things when you are stressed out or when you’re angry at them. I am sure that you would be angry that they spent a lot of money without telling you but, you need to know that they are facing a serious issue and they need your help.
They should look to you for support. You can take them to self-help groups for family members and gambling addicts. It would help if you attended it with them. You need to explain to your partner that both of you are seeking help because of how his/her gambling addiction affects your family. You need to keep assuring them that you both are going to clear this obstacle together. If you have children, you need to talk to your children in a peaceful manner and explain to them that their parent is sick. You do not have to tell them all the details if you do not want to.
Suppose your partner is completely incapable of handling finances anymore. In that case, you need to take over the management of the family finances, and you should also start monitoring the bank and credit card statements, so that your partner does not relapse. Relapse is one of the most significant possibilities when a person is fighting a gambling addiction. Any kind of addiction has the possibility of relapse. Relapse is not the end of the world for them. They can still get better.
Make sure that you encourage and support them no matter what kind of treatment they are going through. You should be prepared for all kinds of setbacks and believe that you can overcome them. You should be absolutely certain that you never lose your temper or threaten them or give them any kind of ultimatums. This kind of behaviour would make their condition worse. You should never overlook their positive qualities because every single human being has their own positive qualities that they should never forget. When they are in trouble, you need to remind them that positivity. Do not expect the recovery to be butter smooth, because it is probably not going to be that easy. Just let them know that you will be there for them throughout the journey.