Okay a little background:
I have an older DB and when he was really little my fathers parents were quite wealthy and spoiled him absolutely rotten, which my parents allowed them to do. He is 35 now and is still spoilt, lives at home with them and doesn't work (or pay anything for rent or food), he has no sense of responsibility or owness for things, if he fucks up they bail him out. He doesn't appreciate things because he has never had to work for them and has had things handed to him on a plate. They have never dealt with these issues with him and it really annoys me. I am nothing like him, I work hard and have done since I left school and anything I have is a result of that, my Dad's parents passed away shortly after I was born so I wasn't "treated" to the things he was.
I have a 1 yo DS and before he was born I spoke to them about the whole issue and that I am very wary about history repeating itself with the spoiling etc. They kind of listened at first but they are now turning up with things for him (they see him at least once a week) most of the time.
It also feels like they are stepping on our toes a bit, he really likes aeroplanes ATM and myself and DH were going to get him one. They were coming to visit on Sat and before they came my Mum rang and said "we have got him a plane, we were going to save it for xmas but we want to bring it tonight for him".
When they got to the house my Dad said "we wanted to give it to him because he's been a good boy". It wasn't a special occasion and he hadn't been a "good" boy or anything they just got it for him. I know I probably sound like an ungrateful cow and I thinks it's lovely they want to buy him things etc it's just the getting him things for no reason and passing it off as a reward I am not keen on. I know he is too little to understand now but I think this should be nipped in the bud before it gets out of hand.
Everytime he seems to like something new they say "oh we will have to get him one of those" before me and DH get chance to and it feels like they kind of think he is their child. AIBU and neurotic to feel like this? How can I deal with this without hurting their feelings or seeming ungrateful?