I am in a similar (though different) position, where I am about to give my dcs some money. For one dc this is a big contribution to buying a house. I have always been wary about interfering in dc's financial concerns, and I am absolutely clear that this money is a gift to dc with no strings attached and no hold over the property. However, we are both adults and dealing with a very adult sum of money, and so we have both had to put aside our reluctance to share financial information. I know how much dc has in savings, and how much the mortgage is. Dc knows how much I can afford to give as a gift, and how much I have left for my own 'frivolity'
. But, for me, this is a 'moment' and in 2 years time I won't know how much their mortgage is, or whether there are savings, and dc won't know whether I've used my money to make a down payment on a care-home place, pay for my funeral, or spent it all on La Perla underwear.
For my other dc it is different, and the money is not yet needed for property (or any other significant purchase). It is difficult because it is about trusting that dc to save it wisely for the future. Dc knows that if the money is spent on bikes, cars, clothes, holidays, then that is their choice and there is no more for a house deposit in the future.
The decision about what to give, and when to give it has only been made once I was sure that my future was secure (with a sufficient cushion for me to have occasional new shoes or to still be able to treat dcs to a meal out), and also has been meticulously recorded, because in the unlikely event that I should die within the next 7 years then the money would have to accounted for.
It is easy to feel uncomfortable about discussing money, and death and taxes, and responsibility, but there is no way I'd be handing over significant amounts of money without having those discussions, and without feeling comfortable that everything was clear and understood. And fwiw, I think your dh is being a bit laissez faire leaving it all up to you... Presumably your ability to have some frivolity in your retirement is a shared issue? And likewise your responsibility to provide for your future care needs?