Was I overstepping in my husband's parenting

Our 15 year old has been sad lately and when he's sad he likes to play his sax. He's good at it. Problem is my husband finds it annoying. So he was trying to get him to do something else. Why I'm mad is he decided to teach my son to play poker with his friends. With REAL money. I walked in on it. My son teaches karate lessons on weekends and that is where he gets money. So my husband was having him put his hard earned money in the gambling pile. I told my husband right then and there he's not teaching my son to gamble. I took back his money and told him to go play his sax or play video games. My husband said I crossed a line and embarrassed him in front of his friends and undermined him in front of our son. That as a woman my job to parent the girls. He should be able to parent our boys how he sees fit. I don't want my son to gamble. I also think teaching them to gamble when they're feeling down is a bad idea. But my husband said I have to right undermining his parenting. I feel like I do when it's teaching our kids bad habits. Not to mention they're more experienced at poker than he is so they were just going to take his money

Edit: I don't really understand people saying I should have waited until after the fact. I should have let them take his money first and then say something? What's the point if they already took his money and it's gone? I also don't agree with never calling out a parent in front of the child. I think it depends on what they do. I have called my husband out before in front of the kids. Like when he yells and cussed out our 15 year old for playing his saxophone. I'm called him out on that in front of the kids because if you feel comfortable cussing out your kid for something like that in front of people you can get called out in front of people. If you feel comfortable GAMBLING with our kid and also taking their money because you know they aren't as experienced as you in poker you can get called out for it. Kids do need to know when their parents are wrong.

Edit: It's pretty naive to not know that gambling is one of the biggest addictions. Yes knowing my husband and his friends they would have taken his money. Also regardless if my son isn't a "little boy" gambling isn't even legal for minors. Gambling with your kid because you don't want to hear them play their instrument and because you don't believe in depression is lazy parenting and I called him out for it and his friends took because they shouldn't be gambling with a minor. Gambling is one of the biggest addictions. Drugs and alcohol aren't the only bad things for you