No, I wouldn't tell. I have thought about this - in detail - and I don't think it would need to get out.

Thing 1 - there's a gap (of time) between when you win and when you actually get the money. We're not likely to run straight out and start spending lavishly on gold-plated yachts. Maybe modest things like paying debts & getting a new lounge suite, etc, but I think we would have a cooling off period before we made any life-altering decisions.

Thing 2 - if you're inclined to give some of it away, you can do it anonymously, or parcel it out in smaller, but consistent amounts. No one would need to know you'd won millions, maybe you're just generous and won lots of thousands.

Thing 3 - I'm of the opinion that people assume we have more wealth than we do. This is because a) people have a glamorised & unrealistic view of my DH's job and how much they must be paying him and b) our life journey has thrown up a number of $ drains that are not typical. So we could show up with a new car or whatever and people would just assume we'd finally saved up enough money/taken out a loan or whatever.

So, we would pay out the mortgage, get some repairs/small improvements around the house, maybe a new vehicle or two, definitely some family holidays, maybe have a spending spree at Ikea (haha). Maybe over the longer term we would think about moving to a house in a better location. But the real difference for us would be having money not to buy stuff, but to do stuff. There are so many things we don't do because we can't afford the entry tickets or the sundry expenses.

But here's the tricky bit - I don't think DH would know what to do with himself if he didn't have his job to go to (!). So I'm banking on winning enough to pay out debts and build our wealth a bit, but not enough for both of us to leave the workforce. LOL.