OK, a little background first: my Mother-in-Law lives with us due to her health, so usually, as any offspring would do, my husband greets his Mom, talks with her a little, asks how she did today, etc. She is unable to work because of her health, but to help us out, she gets our youngest child off the school bus (first grade). When we get in from work, both of our sons are already home.
My family and I went out to eat this evening. During dinner, my husband and I were discussing various things that had happened during our work day, talked about how his Mom was doing, the usual stuff.
Suddenly my son says to his Dad, “When can I meet your Mom? I’ve never met her before.”
Not sure I heard correctly, I ask him to repeat what he had just said. Sure enough, he was asking to meet my husband’s Mother. Through stifled giggles, I explain to him the woman that lives with us that he has been calling Maw Maw for the last 7 years IS his Dad’s Mom.
He wore a total look of shock and confusion for the next 10 minutes.
Just goes to show, the stuff you think children pay attention to and understand said right in front of them, half the time they don’t. The stuff you don’t want them to hear, they catch you say at a whisper from 100 yards away! 
