If you suddenly got rich, would it change your relationship with others?

If you suddenly got rich, would it change your relationship with others?

A year after his death, my father's will has been made known to us, and I'm poised to inherit roughly the 47% of his declared worth, without counting his mansion and an array of properties, financial stocks and other assets.

It was unexpected, I'm getting way more than my sibings and while my wife and I were already well-off, but this is launching us on a whole new dimension. I expected some backlash from my father's widow, but she said she already knew and she's just fine with what she got.

When I asked my wife what are we going to do with this new wealth she said nothing because it's up to me, she only expects that part of it to be used for our children but otherwise she never asked me anything. However she also said she wouldn't like for us to "live like millionaries" and she'd prefer if we kept modest.

My mother first joked that I am her "golden eggs laying goose", but now she got cool with me and we aren't speaking much. She just took a short vacation with a friend and won't pick up my calls.

Updates
10 mo
I have to say that in my experience, I'm more worried than excited.
On paper I know how to handle this kind of sums and assets, but in reality I have no experience, and all the big money were given to me and/or handled by my father.

I'm afraid I'd squander it all and for now we've decided to keep it hush as to not draw less than positive attention.
It's also affecting things with my wife to a certain extent.
Not arguing, but she keeps stressing it's my money to handle and not hers.
Updates
10 mo
I wish to thank everyone on this thread who gave me solid advice and pitched in.
One of the first things we are doing is assembling a team of lawyers, accountant, qualified tax and investment advisors to administrate and regulate all the assets.
At the same time we are also already setting up a succession plan - will and trust funds - for my children and my wife in case something happens to me.

I won't quit my public office job and my wife will keep working in her butchery and meat plant.
If you suddenly got rich, would it change your relationship with others?
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