Hi Lilly,
What a scary dream! I can totally understand why this would be recurring; it sounds like this monster is pretty terrifying!
So, I have the feeling that this dream is about your current feeling of vulnerability. Your house is supposed to be a safe place, but this monster keeps finding a way in.
Think about it: you and your siblings are all alone in this big house, and that could be representative of how you're feeling right now - like you have to fend for yourself. And the fact that the monster is always getting in could be a reflection of your anxieties - like no matter what you do, you can't seem to keep the bad feelings out.
Your dream had the intensity of 3 (out of 10), which is significant enough especially as it was tagged as a recurring dream. It is quite possible that this dream represents some anxiety caused by your current living situation. If this feeling persists or intensifies, it is worth considering talking to a therapist to find ways to manage or change your current circumstances.
What stands out to me is the part where you touched the monster. This could be a really important piece of the dream. It could mean that you're starting to confront your fears, maybe even curious or more informed about what you're worrying about. However, the fact that he seemed happy and then wouldn't let you close the door could be representative of your feeling that as soon as you let yourself feel vulnerable or try to face these fears, they become worse.
You also mentioned this dream is recurrent: did you notice any similarities or differences between this and the previous times you had it? Thinking about that could also reveal patterns in your emotions and fears in your real life.
Remember, Lilly, while this may be a source of confusion or concern, talking it out with a trusted friend or professional who's trained to help you explore such matters and could provide the needed assistance and support.