Have NC.
I work from home so my DS8 regularly has friends round after school for tea and I have often helped out my office-based friends with childcare in the holidays, even taking their kids for full days when they couldn't get time off. But lately I've been getting a bit narked because it's never reciprocated, despite two of the friends who I help out the most now doing pick up a couple of times a week. Instead, they invite children back who have siblings the same age as their little ones, so it's like a double date. I get that it's easier with 2 x 2, but my DS is starting to question why he's never invited to so-and-so's house when they always come to ours.
Anyhow, I was going to let it slide, but I've just found out that there have been days out happening between two of my friends and their kids and they deliberately don't invite my DS along because he's an only child. To avoid drip feeding, it was one of DS's friends who mentioned it - he was talking about an activity and when I said DS would've liked to have tried that, he said they can't invite him to things like that because he doesn't have a sibling and it makes things awkward. The only way the friend would've said something like that was if a parent had said it first.
Naturally I am bloody furious on DS's behalf and also kicking myself that I've been so generous with free childcare. Should I say anything to the mums, or let it go and simply scale back on their kids coming to ours? To be fair, the children aren't DS's closest friends but their mums are close mates of mine, hence why I've always been happy to help.
AIBU to be wound up about it?