My partner (M39) and I (F27) have been together for nearly 3 years and we have lived together for the majority of our relationship (renting with the council). We are happy and love each other so much. Approx 4 months ago, my partners mother (F64) came from South America to live with us but she is classed as an adult dependent relative which means she is fully reliant on my partner financially (she has no access to public funds). She is also unable to work due to health conditions. Currently, the 3 of us live together. She is an absolutely lovely lady and we get along so well, but I made it clear to my partner from the start of our relationship that I don’t want us to be living with anyone else (including his mum) in the long term - I want us to live alone and start a family soon. We have been saving for a mortgage for a while and the original plan was that me and my partner would move out and his mum would reside with a family friend because they HAD a good relationship previously, however this is no longer the case. We now only have 2 options. The first one being that I get a mortgage in my own name so that my partner can keep the council property for his mum to live in. However, as my MIL has no income, we would need to financially support 2 households and this isn't financially sustainable in my opinion. The second option is that we buy a house together, scrap the council property and build an annex in the garden for my MIL to live in. This seems to be the most favourable option in my partners eyes, however this is also expensive and isn’t something we could afford to do straight away (which would mean MIL would need to live with us for a few more years until it is possible). Initially, I was also considering this option, but the more I've thought about it, the more I'm doubting it. I have a fear that she will be coming into the house often seeing as we are so close in proximity. Like will she expect to eat with us every night? I feel so bad saying all of this because I have a good relationship with her, but I seriously need my privacy and alone time.. having to entertain her all the time is exhausting, plus me and my partner are in our prime time and I'm feeling weighed down by his mother being constantly around. I also feel like he acts like a child around her.. she’s constantly attending to him and it drives me crazy - where’s the independence?! Also to note, she doesn’t speak a word of English, so although she’s nice, there’s no connection between us. I've even suggested that he send her back to South America because she doesn’t particularly seem to be enjoying it in the UK anyway - she has no friends, doesn’t get out much and sits watching TV all day or cooking/cleaning (which again, annoys me!). She can do much more in her home country. I said we could send money every month, but as you can imagine, this didn't go down very well (as the life and conditions in their country are so bad). My question is, do people think the annex idea is a good idea? Do you think we we'd still be on top of each other? Do you think I'll be able to have my privacy in this scenario? I'm seriously trying to decide what I want. I love my partner so much and I know he's only doing the right thing by his mum (as she is single and he is the only child), but I feel like as a result, I'm the person impacted.