Please help?,no one helped last time?

my friend is 14,shes the nicest person ive ever met,shes stunning,a good friend and will do anything for you,her clothes are always clean and her hair hair is lovely and her teeth are sparkling white,but her family are poor,they live in the poorer end ofthe city,however we go to the same skool,she shares a room with her younger sister,they dont have a carpet,they share a 3/4 bed,which has no covers on the quilts,the walls are dirty and often have spiders running around,shes fell out with her family and is often sharin my bedroom at my house,my mum said shes welcome anytime,i dont really want her goin back ever again to her home,its disgusting and just unhuman.iam worried for her,What should i doo?