False accusation and intimidation from my sister inlaw.

Hi, I am a full time mother of 4 children (from 13 years old to 2) and my husband works part time on weekend when i am home because he pickup the children and take them to their activities.' I am the sole supporting the family with mortgage and food. he decided to bring his 2 sick elderly parents( 75 & 82 years old). i didnt agree because they have both demetia and i know he will not be taking care of them , as it happened last year. after 3 days of having them, he couldn't give a bath to his mom because she refuses. he became angry and yell at me and the kids and force my oldest to help with bathing but because the gradma was smelling very bad, my daughter start trowing up. when he sees that, he sweared he will not pick hem up from school. when i found out i was very angry an explained that it wasn't health for a child to be smelling or dealing with his parent because they need a medical/nurse help. we were yelling to each other and he callewd his sisters to complain. after a little bit of time, the cops nocked to my door and they told me that someone called them and told them i was abusing elderly. my in laws both denied the accusation and they left. after, i couldnt stay inside the home, i was scared for my kids from my husband behabior and for me because of the false accusation. i spend 2 night in my friend's house but i need to go back to my home ( i need my clothes and my kids clothes and school books). i don't know what to do in this case? i want to go back and use only one room and dont deal with him and his parent but i am also scared about any false accusation. please help me.