1) Their clothes are as big (or bigger!) as yours.

2) When you see them without shoes on you have zero desire to coo about how adorable their feet are.  And even less desire, if that is possible, to munch on their toes. 

3) Ditto for blowing raspberries on their chubby bellies.  And not just because their bellies are no longer chubby.

4) You no longer reach for their hand when you cross the street.  Nor do you remind them to look both ways when they cross.

5) They no longer think you are the coolest person ever, or at least they don’t show it.

6) They would prefer that you drop them off places a block away.

7) Similarly, when you are out shopping they walk at least 20 paces behind you and pretend they don’t know you.  Because clearly they are there shopping alone.  Don’t all young teens grocery shop by themselves?

You talk about college plans and panic realizing just how little time that is.  And how little money you actually have saved.

9) You buy a cartful of snack foods at the grocery store thinking that it will last you for a week only to discover your children ate it all in a single day.