Mother-in-Law HELL

omg when my boyfriend and i first started dating everything was fine we barely have the need to go see them since we where always out and about. but he did live with his parents first he was 27 a mommy and daddy boy but we where barely there then we decided to move in together and buy a house and we got pregnant this was the first baby for both of us meaning fisrt grandchild my parents live back in mu home country so his family is mainly all we got here. they are really needy and drive me crazy he cannot seem to tell them no for anything and it kills me b/c I say no to something and then they ask him and is ok I dont know what else to do then is his little 19 year old brother that has never dated anybody and he si just so ugly and dumb like to kiss the baby in the mouth when nobody is supposly wacthing but im like an eagle when it comes to my baby and them. they also always want to give her stuff to eat that I dont agree with and they always want to auto invite themself to everything we want to do Im to the point that I dont even go to their house because I can not fake being nice to them any longer and the fact that he is a family man is killing our relationship and I dont want this anymore. what can I do so he can stop being a mommy and daddy boy and stand his ground for our own family.