Husbands family mentally torturing me and my husband, what to do

hi i got married before a year me and my husband are very happy with each other and my husband is only one who is supporting his family financially i am also a working girl and now my inlaws are demanding for my salary which i dont want to give because my husband his giving them every thing he does keep money with him for us or he dont safr=e to our future kids. and sis in law is giving me mental harassment she jealous from me very much because she is not educated and not doing on every day she keeps on pushing my mon in law and father in law and keep blaming for every thing she is the only reason for fights bt still my mom and father in law listen to her and follow her. yesterday even in arguments my huby's uncle slaps him in front of every one which i cant tolerate my husband is very innocent dats y all are taking advantage of this and try to keep him in their hand plz suggest me what could i do he is taking care of whole house but still every one is after aur life n our way of lyf