If it is your SIL that is doing all of this then talk to your brother. Tell him that you don't appreciate things. I found in my family, the only thing to do is be straight forward. My sister and BIL do not like my nephew coming over to my house because my husband and I raise our kids differently. I do not let my kids watch a lot of the programs that they do, and also, my son only has a V.Smile - not a playstation,X-box, and Wii (like my nephew). I feel that this is a critical stage in his life where learning is a priority, they think that paying money to send him to some fancy school is going to teach him everything he needs to know. When my sister told me that she doesn't agree with the way I raise my son, I told her to shove it up her ...... I raise my kids how I want them to be raised, and that's that.
We talked about the situation and the middle ground is my mother's house or my father's. That's where the kids are allowed to play with eachother because there- grandma and grandpa have the final say.