Wow I am so sorry!! I can only imagine how it is with freaking strangers like that. Something similar happened to me in 2018/2019 when my fiancé’s dad came to move with us suddenly, which I was fine with at first but it was also extremely last minute. I was pregnant and next thing I know I’m coming home to find my fiancé’s brother showing up to our house with 6 bags and fucking moved in with us without even mentioning anything (he still lives in our back house they made for them). At the time my fiancé’s cousin was also living here but he was already staying with us and was a good roommate. He would clean after himself and buy his own food, etc. I was so fed up with the dirty house and being the only one cleaning as well. The only thing that finally helped was leaving to my moms. It was only a night but I said I would stay there if he didn’t get their shit together. Unfortunately his dad ended up passing away while living in the back house they built but now we are stuck with his brother, who yes is an adult and can’t take care of himself. His own mom doesn’t even want him back at her house. He has horrible horrible ADHD and isn’t on meds and always drinks. The stories are very similar and I know it’s incredibly annoying. There’s really nothing you can do because your husband isn’t listening and doesn’t care. If possible I would just leave and go to your moms. Your husband doesn’t care and is putting other peoples needs above your own. My fiancé’s excuse was he wanted to help but now look we’re stuck with his brother for probably forever. Please try to find a way out or a way to get them out!