I so totally understand how you feel!!!! So hate it! Or this one "So, do you want any children"... I am like thinking inside.. duuhhh yes I do,,, I have been trying almost a year, and I can't get pregnant!! Or sometimes I feel like being mean and saying... what do you care if I get pregnant or not?? cause it gets me so mad
So, if they are single I say: Sure I will, when you get married lol... or if the person already has children I say "Sure when you get number 2 or 3"

and then they change the topic LOL