Seriously...comment rant

I try very very hard to be kind and gracious to all. And not to lie. Honestly. Although I may think the rude comments in my head, something much more kind comes out. I'm also learning how to walk the fine line of "adoption is nothing to hide and be ashamed of but we don't need to talk about it all the time to everyone". I struggle with that.So, anyways. (And some have seen this on FB already). Last night. W-Mart. Checking out with my 10 mo old. (Big kid and dad were gone.) I'm putting my stuff up on the conveyor belt, P is waving and smiling at the person behind me. I look to see who he is flirting with, because they're not always receptive. It's a very (VERY) elderly lady. She asks me, "How long have you had him?" (And that's my BIGGEST pet peeve question. Just seems rude. And NOYB.) So I look at her with a look that says I don't know what she's talking about and crazy and say "He came home from the hospital with me." True statement. Not the whole entire truth, but true.Then...oh, then. "What's wrong with you that you couldn't have kids?"Oh, boy. Deep breathing. And in hindsight, I should have just turned back around and ignored her. I really should have. Either that or just said that he was my kid. Why didn't I think of that? All those well rehearsed comments...But hindsight's 20/20. Noted for next time. And I completely and totally lied right to her and told her I never even tried. At least I stunned her into silence.Note to self: practice repeatedly saying "Why do you ask?" until blue in the face. I really thought that after 3 1/2 years, I would be better at this.