im not living with them, and even my future in-law visit me after my confinement period in the future, i will make sure all things still goes my ways (but first , you need to express your needs and you pantang-larang bout people and so on) and all the things bout baby's well-being expecially all the old people remedy to cure the Jaundice , dont let them try anything except science，both of you and your hubby must stand strong against all remedies that "un-science" but sound do-able. and bout the food (if you are  chinese la, ) communicate, not so much of oily soup with sesame oil (it will clog the milk duct),

another word, use your hubby as the communication bridge, let their son to say no on behalf of you , or you going to have a hard time. all you and your hubby must bulat suara and decide who is the one to rule and making decision for the kid' education