My wife had our 12th at age 45 and our oldest was 26 with 3 of her own. We have grandchildren who will straw-buy alcohol for their aunt. 
Only grace will get you through. Providence saw fit to bless you with another child and Providence will equip you for the work ahead.
My mother was the last child in her family, born when my grandmother was pushing 40, and my mother had a niece who was several months older than her. My mother was born being an aunt.
I don't think her niece ever bought my mother alcohol. The niece was a major alcoholic (as well as having epilepsy) and died at a fairly young age on account of her illnesses. My mother doesn't drink, never had any bad habits, and is now 92, you wouldn't guess a day over 75, and totally in control of her mental faculties --- if you get into a debate with her, she will win and you will lose.
Every time. Amazing lady.