Op no you're not unreasonable.
You were clear with your DH what you didn't want, by the sounds of things, and then got exactly that.
The whole thing sounds awful.
And for everyone saying enjoy it, sure it sounds like fun, until it's 36, it's QLD, there's two small kids and no shelter. Or even without all that, it sounds like fun until it's the exact opposite of what you agreed to. And why should you expect it to be that? You raised it first for this reason!
I would be hot. And maybe once I'd gotten home, had a shower and cooled down id be annoyed. I'd tell DH I'm annoyed. Go to bed still a bit miffed. Wake up in the morning feeling better, no longer annoyed but won't go to that farm again anywhere near harvest!
Im in two minds. While I have a 23mo and live in qld I don't blame you for being annoyed it doesnt sound like a nice afternoon in the sun but on the other hand if you knew the afternoon would probably have turned out like this I would have stayed home with the toddler and just sent dh and your older child to help. I would have been annoyed with dh for not being honest in the first place and saying what his plan was.
Sounds awful OP. I would feel annoyed too, but more so at myself for not trusting my instincts by staying home with the kids!
I can understand your DH wanting to help and his parents wanting his help too, but it's not very thoughtful of them to get on with their business while you and the kids roast in the sun.
I wouldn't visit again during harvest time, not until the kids are older and able to help with picking.
I would have just left, explained to the in laws it was too hot for the kids and askd if they could give your DH a lift home.
In future...take two cars. Chances are your in laws will want your dh to help at harvest time.
I got the impression from your OP that you said you didn't want you and your kids to be picking olives, it didn't sound like you meant you didn't want your DH picking Olives. If you had said you didn't want 'us all' or 'you to' pick olives then I can understand being a bit annoyed, but it doesn't sound like your request was specific enough.
But if your DH was clear you didn't want him doing it and he did anyway and did so without saying look I know you didn't want me helping but I feel really bad and want to help, I'll make it up to you, or without some explanation, then I understand totally where you're coming from
In 36 degrees, I would have been needing a gazebo or something, but then I would have clarified that before we went.
I would not cope in 36 degrees in full sun.
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