Your mom would never forget your birthday, right? Well, a mom in Michigan recently forgot how old one of her kids was, but it was a good thing she did.

Antoinette Ousley lives outside Detroit, and she won a pretty sizable chunk of money in the lottery this month because she screwed up her kid's age.

Whenever she buys a ticket, she comes up with the numbers by using a combination of her kids' ages and birth dates.

And one of her kids recently turned 20, but she forgot.

So she used 19 as one of her numbers last week, matched all five numbers in the drawing, and won $78 thousand dollars.

Her other kids are younger, and still live at home. So she's planning to use the money for a down payment on a new house.

Read more at MLive.