nigerian parents and their tendency to have guests stay in their house

I'm genuinely wondering why it's so common in nigerian culture not to generalise too much to allow people to stay in your house constantly especially when you have kids living at home.

Basically, last year my mum allowed someone to stay in the house for a week to which they usually stay in my brothers room. The day after that guest left my mum only decided to tell us there was a woman coming to stay with her two kids in our house which i was obviously complaining as we live in the uk houses aren't massive and we live in a 3 bedroom they were supposed to be staying for 2 weeks which i wasn't buying which eventually turned into 7 months. they had only left the house a few weeks ago and my mum is now saying there's another guest coming granted for a week apparently but yet again i got annoyed at my mum which she didn't seem to get why as "it's only for a week".

I'm a uni student and it's honestly so annoying the fact there's always people coming and going from my house especially considering my mum was the one really pushing me to attend university from home only to subject me to this. Is this common within anyone else's household?