Am I overreacting?

I live with my ex’s mom and her boyfriend (along with his unemployed 22 year son who just moved in 5 months ago and isn’t actively looking for employment of any kind). We live in his house. Yes I pay rent, I buy groceries for the entire household, I cook for the family, I clean, I pay my own bills and utilities for the house including internet, I have a full time job, I have my own car, etc. Anyway, I am in a long distance relationship (for now until we make permanent plans which will probably be soon). My boyfriend bought a plane ticket and is staying at the house for a week before he flies back. We have an amazing relationship. My ex’s mom’s boyfriend said it was more than okay my boyfriend could stay with us for a week. He said the decision was up to my ex’s mom because it was her house too. She said yes and was excited for him staying with us.

So anyway, he’s been staying with us and everything has been great. Last night, I expressed to my boyfriend I wished he could stay longer. I asked my ex’s mom if it was okay and she said he could stay for an additional week, so my boyfriend changed his flight. Well, the following morning, my ex’s mom told me that he can’t stay for another week and to change his flight so he can go home over the weekend. The reason is her boyfriend said he hasn’t been sleeping because the cats keep meowing at night since we have a new person in the house. Tbh, they always meow at night and have the zoomies. Her boyfriend is a light sleeper and her son (my ex) is coming to stay for 2 weeks next weekend which I wasn’t even aware about beforehand. If I sneeze at night or get up from my bed, it wakes him up in the other room and he complains. Everything wakes him up. He also likes to comment at what times I go to bed at night which I think is a bit weird since I’m an adult. He’ll say, “Wow, you went to bed really late last night at midnight.” I am not loud at night. He hears every small thing. Neither have my boyfriend and I been loud at night. We’ve been as quiet as possible and have to walk on eggshells just to be dead quiet.

Anyway, my point is, I feel like this is unfair. It should be my house too but I feel like a stranger in the house who has to ask permission for everything under the sun. My ex’s mom said she feels like we are imposing on her boyfriend and taking advantage of his house by letting my boyfriend and her son stay over, when in the first place, he said they can stay over with no problem. She said her boyfriend isn’t sleeping because of the cats meowing at night and it’s because of my boyfriend since they aren’t use to him. She also wants my ex to sleep in my bed with me due to the limited bedrooms in the house. I DO NOT feel comfortable doing that. Why can’t he sleep on the couch? Why is he staying in my room? I pay rent. I pay for my room and I feel like I have ZERO privacy and NO say in anything. Now they (my ex’s mom’s bf and her) feel like I am overreacting and acting like a brat because I am very upset and mad. They told my bf he can stay as long as he wanted and then the next day, told him to leave soon. He can’t stay more than a week but her son can stay 2 weeks? And my ex’s mom’s bf his son brings people over all the time without asking. Am I overreacting or do I have a right to be mad?