I think this is the first time I've commented on here. I'm in my late 50's but don't have GC yet. However, reading some of these comments, I wish you were my DH parents!
We have never lived more than a 15 minute drive from PIL - my DH is the eldest of three and the only one to live in this country. My DD was the first GC - when we announced they were going to become GP, MIL said she didn't feel ready! Fast Forward three months and her DD announced she was pregnant - MIL couldn't be happier at the news.
I lost my DF when I was 3, my DM when I was 30 and my Step-dad aged 36. My DH parents are not in the least bit interested in us - I constantly nag DH to give them a call but they are far more interested in their other DC - who they can manage to speak to weekly, despite living the other side of the world. Same with DGC - no interest whatsoever. My MIL would like to see the flat my eldest DD has bought overlooking the Thames but, tbh - it means us driving them up, as MIL only drives short distances and I don't particularly want to be sat in a car with them for an hour each way. I'm now at the point that I try to get my DH to visit, purely because I don't want him to regret anything later on, but I do sometimes wonder why I bother.
A couple of years ago DH and I popped in to see them one afternoon. MIL wasn't feeling too good and, when she took her blood pressure, it was dangerously high. She thought she would just lie down but FIL was worried. I contacted their GP, got some advice and then we drove both PIL straight to the surgery and picked up prescriptions etc. I don't know how many times we have offered to help if they need it, but I no longer bother.
I guess the saying "you can choose your friends but not your family" is very true, sad though it is.