Compromise
I had a similar but opposite problem with my parents. They went the opposite route, and allowed my kids to do lots of things at their house, that we did not allow at our house. At first I didn't see the harm in letting Gma and Gpa spoil the grandkids a little, but when they started visiting once or more a week, their rules began to affect our rules. My kids started making it clear that the message they were receiving was that Mom and Dad were unreasonable for not doing the same things, and that our rules only applied in our presence (big problem). It began taking most of the time until their next visit to straighten out some of the behavior. For example: Our house sword fighting is a no-no because my boys are 5 years apart and I don't want baby losing an eye because big brother got excited or vice versa. (we still have this problem 2 years later! all because Gpa thought son needed an outlet for his sword fighting desire)
Sooo it fell upon me (as they are my parents) to have a polite discussion with them about how now that they are seeing the kids more often, how they deal with them at their house has a larger impact on their long term behavior than if you spoil them once a year at Christmas like a lot of grandparents. Since I have wonderful parents, we had a nice discussion about wayswe could compromise and allow some spoiling and granparents house priveleges, while trying to back up Mom and Dad's authority and child rearing beliefs. It was very hard to start the talk, but we all felt better when we had worked it out. We still had to work out certain issues, remind them of which rules were most important to us, and comproise on some of our beleifs for the sake of their relationship. In the end, it helped a lot, and didn't fix eveything.
I think it is only fair to expect our parenting beliefs to be considered in the way others deal with our children, while we must respect how others parenting beliefs affect how they interact as well, and look for compromises and win win situations so that we may work Together cooperatively with those who help us raise our children (whether they realize that is what they are doing or not). Sorry it took so much space to get all that out. Either way you have my complete sympathy for your frustration, and hope you can find gentle solutions which will work for all involved.
