No i don't understand your lifestyle at all.
Are you saying you were "sarcastic" with that "This must be a joke"-comment?
Won't work, since the picture was already made in jest, so making a sarcastic comment to that image would be adundant.
Just like every evening, I am sitting in the living room with my wife and our two dogs watching the television. I am a husband, a father and a grandfather. What about my lifestyle do you not understand?
You did not originally post that picture, thus you don't really know if the poster meant it in jest or they actually thought she looked good there, do you?