First thing I would do is pay off mine and my moms cars, so ~$15,000
Then I would give my mom $1M for her to live on so she doesn't have to live on the crappy retirement checks she gets now.
Next, I would donate $1M to my church so they can build their new building and do whatever else with it.
Next, $1,000,000 max on at least a 3 bed/3 bath house somewhere in either Colorado, North Carolina, or Florida.
$150,000 for a Maserati Quattroporte Sport GT S for me as a daily driver
$74,000 for a Mercedes Benz E500 4Matic for the future misses
$120,000 for a Porsche 911 Targa 4S as a weekend car for me
$~70,000 (average price according to autotrader.com) for a Ferrari 355 because I've always wanted one and I have $15M to spend so dammit I'm going to buy one.
That leaves $11,571,000 assuming I spend the full $1M on the house.
Now I'll pay off my sisters house. I have no idea how much she owes, but lets say its $150,000.
I'll pay off her Chevy Avalanche next. Still no idea how much she owes on it, but let's say around $30,000.
That leaves $11,391,000.
Next I'll donate $1,000,000 to the National Down Syndrome Society.
This leaves me with $10,391,000.
Next, I'll take my close friends on a shopping spree and spend $391,000 on them total to end up with an even $10,000,000.
Finally, I would split my $10M and put $8M in the bank to live off the interest and then invest the other $2M.