Hello, I’m so sorry you’re going through this. I had the same discovery when our baby was about 9 months old.
like you have mentioned, the amount of lies that had been told in order to cover his gambling addiction was shocking, never mind the money that should have been in our little family that was gone.
you don’t have to make any decisions right now, but you do need support. You are not alone, and now that you know better what you’re dealing with the good news is you can now get the support that’s waiting for you.
there is a uk charity called GamCare. They help addicts and their affected contacts. I called them a day or two after finding out about my husbands addiction and they set me up with a therapist in my town (they are all over the country)
I had weekly sessions with him for a while, all for free. They weren’t really about me or my deep feelings but rather about helping me to understand the psychology of a gambling addict, to recognise behaviours and patterns that were happening in my home, and to get the insight and tools to navigate them.
in my case, these sessions helped me to see how deep my husband was in his addiction, how much I had been manipulated and was a victim of financial abuse, and how to break free of his behaviours. I still call on the knowledge and techniques those sessions gave me 10 years later, when he falls into his old ways (we are now divorced)
for him, gamcare will provide addiction help through one to one therapy, group meetings etc. but he has to want to engage with it and you can’t make him. You can call gamcare for yourself and they will help you to suggest it to him.
the other way I found support was to blow the lid off his secrecy - I called his mum, his sister, my mum and told them what I’d learned. His complex web of lies came tumbling down and his family were then in a position to rally round and support him, I suggest you do the same as this will make a big difference in whether he can continue gambling like he has, or whether that is made more difficult for him and he has support instead of co-operation.
im so sorry you’re going through this, you will come through it but take it one day at a time