So pissed at my family

So background info my family is from Jamaica and life is different for those of us who did not come to the states you take what work you get to survive in a lot of cases. All of my cousins and family are hard working and my honest money. My sister in law is a different case. She resents my husband bc he got the opportunity to celebrate to the states when he was a teen. He worked really hard and is now a Architect with a well paying job. They also have. Younger brother who had the opportunity to be brought to the states who is also doing very well as a marketing rep at a well known cell company. My Dear father in law brought both of them here but they were both filed for prior to being 18. She is 3yrs older than my husband. We all pitched in to get her Visa so she could travel and eventually bring her son up. My husband and I have a 7yo daughter we wre pregnant with twins boys at the time that sadly end in miscarriage. We agreed to adopt her son so he could have a better life. He is 9 and always enjoys spending time with us when we go back to our home in JA. This is all alot since his sister is such a moocher. When we lived in Jamaica she always wanted my daughter to spend time with her but she always asked for money or groceries in return. Something we never asked for when taking her son. She often would ask for milk,lasco, and other groceries a day or so after ua dropping my daughter didnt work and never had a actual job until coming to the states. She thinks certian work is beneath her. She claims her son's father is in jail he is actually married. And she does not admit to him being involved in there child's life at all. She puts a guilt trip on my father in law to take care of her. Her mother has married and will also soon be coming to the States and now her son a 9yo has no where to go. My husband's mother passed this past winter and since my husband has felt alone and this SIN of my has not been supportive at all. No calling or texting nothing. One call the day she passed then ghost for 8 mos or more. My husband leaves the country on business last Friday returned today... and would you this stinkin ass sister of his has had one of her married boyfriends find her a job here and she plans to stay at our house. My husband and I both only heard of this Friday and she will arrive Tuesday at noon. My husband have had 12 family members live with us in 10years and it is taking a toll on us. When we are alone it is so blissful as soon as someone else come into the mix its chaos. Anyways I had to vent. And idk wtf to do I want to leave but ik my husband needs me...I have some severe anxiety and depression from some childhood things and I feel very possessive everyliving space and this is sending me in to a manic statr that is uncontrollable. HELP