I've been there and believe me I've felt the frustration. When my son was 8 months old we had to move in with my dad and his wife. I think that the most obvious problem the quickly developed was that in their eyes I was their child, NOT my son's mother!!! So basically I was in a situation that made in next to impossable to parent effectivly. 

Although I have moved out, things are still a little hard because my son spends so much time at the grandparents house. Being a single mother and working full time I do feel more comfortable having him with family rather then at a daycare. But again, this has me in a situation where my rules and guidlines for his behavior are not followed! Basically I have learned that grandparents like to spoil! So it is best for the child to not see the grandparents all of the time! This school year I am putting my son into after school daycare. I'm hoping that this will help with some of the disciple problems we've been having.

His major problem is that he argues with adults, me and teachers! Last year was horrible. I know my son is a kind and loving little boy, but it was heart breaking to see that these teachers just saw him as an argumentative bad little boy! I'm hoping that by having him around more kids and less adults he'll stop thinking he is on the adult level, and not be so prone to think he know more then the adult that he is arguing with! But then again I could be wrong! Any suggestions on how to deal with this situation would be greatly appreciated!