Am I selfish for making my hoarder sister sign a contract to live with me?

So my 41 year old sister she is a hoarder I told her she has a hoarding issue of letting things go the momnet a threw away a lipstick that was expired from two and and a half decades ago. My sister still keeps cosmetics lotions she bougth from 2001 disgusting and ridículos.

Few weeks ago she called me that if she could stay at my house while she gets money for an aparment my sister thinking O was going to say yes to her immidatly. I told her that she will need to sing a contract in order for that yo happend and that O dont want her junk hoarding un my house my sister called me selfish and hang up. Am I selfish? Or a bad sister?

Am I selfish for making my hoarder sister sign a contract to live with me?
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