You may have a gambling problem, and you may not have one, there is a lot of details missing from your story.
have you ever canceled plans with your wife because you were playing pool?
do you spend more time at the poolhall than you do with your wife?
when was the last time you guys went and did something just the 2 of you?
it sounds a lot to me like she's more worried about you not spending time with her than she is with you playing pool.
I was on the road playing about 40 years ago, I beat a guy out of $600 and as we were finishing his children came in dressed like orphans in bad need of new clothes and shoes, I thought for a second that maybe it was a setup but they didn't make a scene, they were dragging their dad home with them... that $600 I took from that guy was way more than enough to properly dress his children and put food on the table for them... I asked the bartender and he told me he had a very bad gambling problem and was known around town for putting the rent money up at all times... the pool player in me wanted to say that was his problem, but the human being told me I couldn't do that, so I stopped the kids and gave them the money and pretty much stopped playing at that point... I only started coming around when my nephew took up an interest in the game, and to this day I haven't been able to get the image of those children out of my head.
I said all that to say this, there isn't many out there that have gambling problems that can admit it, or even notice they have one... if you find yourself passing up opportunities with family or friends to go to the poolroom and gamble, you have a problem... 40 years from now no one is going to care if you ran 2 racks of 9 ball, or ran an 8 an out for 10 bucks, but time well spent with family and friends will be remembered.