You know you're a mom when

You're sitting in Panera when a kid starts to choke, and your head whips around so fast people think it's your kid.

You see a kid throwing a fit in a public place, and instead of thinking, "shut that kid up," you think, "those poor parents."

You tell speeders on your street to slow the hell down (even though you used to be a notorious speed demon).

You run to hold the door for another mom struggling with a carriage.

You go out to buy clothes for yourself and come home with baby-sized ones.