Oh my gosh, what kind of a person takes such a personal question to such an extreme? And why would they use the word "finally?" You've got plenty of time to decide when--and if--you want kids. I feel your pain: I'm 22, not even married yet, and my FMIL has already mentioned kids. To do her credit, though, she did add, "Not anytime soon, though, no pressure!" and my FH and I didn't have the heart to tell her that we're pretty sure we don't want any. My advice to you is, next time your so-called "friends" start in on the kids subject, gasp and start (fake) crying. If you can't force tears, just hide your face and sob. Have your DH say something along the lines of, "Thanks a lot, that's a really sensitive subject!" and both of you walk out. Unless they're truly horrible, unfeeling people, they won't bring it up again. Yes, it's a bit extreme, but you've tried a reasonable answer, and that didn't work; it sounds like arguing with these people doesn't work, and probably telling them off will only result in an argument. If you and your DH want to remain friends with them, such drastic (and often funny) measures may be the only way to make them shut up.
i guess in lucky..noone asks us the kid question..the qustion i did get asked which is annoying is how long have you all been together and the answer dont please them..but oh friggin well..not my problem lol..fmil doesnt even mention kids..heck my own mother dont mention kids