In deciding they can't see ds (3) unsupervised.
The in-laws live in another country so we don't actually see them much, but when we do it's usually for a block of time.
There is a HUGE issue and some smaller ones. The huge issue is that a few days before we returned from the US this Christmas I discovered they hadn't been fastening ds into his car seat. It has a flimsy plastic chest thing which I assume is to keep the belts from sliding off his shoulders, it's not even as "strong" as a pushchair fastener, but they haven't actually been fastening the harness between his legs. They know how to do it as they've done it previous years (of course now I'm wondering if they have). I had even fully explained how to lengthen and shorten it from when he has a thicker or thinner coat on. MiL's answer to this when I brought it up was "I guess I wasn't listening".
I couldn't even bring myself to confront them, neither could dh when I told him, we were both shocked, just shocked, I mean if they can't see that that is wrong themselves what hope did we have? We decided that they need to be treated as irresponsibly as they are and aren't allowed to look after ds without supervision. Which we did for the remaining couple of days. It hasn't come up yet but it will. I don't believe we are being unreasonable... But I blame myself as well. When ds was 3 months old I was having problems getting the seatbelt in my sil's car around the car seat and mil went "oh it'll be alright".
It's not just that of course. I think I've been very reasonable in being more laid back about what they do with him and what they feed him. Yet despite this they sneak things to him. MiL always has candy in her bag that she feeds him on demand then comments that he hates this or that food. I found out every day they had him they gave him McDonalds and FiL sneaks him pop. I even gave in last year as he was 3 and said I didn't mind pop with sugar in, preferably more "natural" but I drew the line at artificial sweeteners. And though I am not a fan of crappy fast food it's not going to kill him so I don't mind now and again. Yet still they do it. Which we found out when ds said to FiL in DH's hearing "Only when no-one is around". I am just so angry they are teaching him it's okay to be sneaky behind your parents back. He's only 3 ffs.
This along with comments like he's their reason for living (not much pressure for a little boy there) and you don't know love until you've been a grandparent. And when am I going to have a little girl as MiL always wanted a little girl (DH is an only child by their choice).
I cannot understand it. I cannot understand their version of love which does not include care for a person's physical well-being. I fear they see ds as just an object to fulfill their selfish emotions, like it feels good to them to feed him so much crap, and it feels good to have him to cuddle and play with and never mind those petty annoyances like protecting his life in the event of a car accident.