To give some background, we see MIL and her DH about once every 3 weeks, she lives 1hr 30mins drive away (pre DS we saw her once every few months), we generally go to them rather than them visiting us. Most visits DH has a disagreement or argument with his mum - I'm not from a family who does arguing so frequently, and when we first got together it used to freak me out a bit, then I got more used to it (and it was even sometimes amusing when it was something v silly and they were both just being stubborn). However, since having DS they have been about more serious stuff - ranging from MIL not telling us she was going into hospital (admittedly for a fairly minor operation) to criticism of DH's parenting (eg implying that DS bites his fingernails because DH shouts at him). I am often not in the room when these arguments occur, but often they seem to me to be 50/50 blame wise, with MIL saying something thoughtless that I'm sure she doesn't really mean, and DH quick to take offence.
To get to the point of the post, a few weeks ago it was DS birthday,we didn't have a party just got both sets of grandparents over at the weekend for lunch & cake at our house. I walked in on DH and MIL talking - she said that she didn't have much of a relationship with DS, she didn't get to see him on her own without us, that she felt that we'd been keeping DS from her, and that it was too late to change things now he was off to school but that maybe things could be different with the new baby (I'm pregnant). I was upset, and said that we'd never keep DS from her, if she wanted to take him somewhere she only had to ask - but that as both I and DH work, weekends were family time for us to spend with DS too, and that we visited so we could see her as well, not just for DS. DH pointed out that there would still be plenty of opportunity to see DS once he was at school with all then holidays.
I am aware that she has said that she would like to see more of DS (in general terms) to DH before, but given the distance and the fact she works, we haven't actively tried to do more. But after hearing those things directly from her, I feel pretty upset. And DS loves going to see her! I have tried to talk to DH, but he says it's just what she's like and we should just carry on doing what we think is best for our family. But I've been dwelling on it, I can't just forget it, and wondered if anyone had any advice?