I dont think im wrong for feeling this way. How would you feel if you were in this position?

My father's only priority has always been and will forever be money. He never discussed it with me and my sister (we're in our 20s. Saving to get tf away from him) to move in an elderly woman who has a sister, Kids and grandkids who for some odd reason can't care for her into our house. Having rehab after surgery here too. We don't know this woman. My dad said she's a Facebook friends family member. He committed to it yesterday and said it's happening. He's pretending to chalk it up to "it's the Christian thing to do", I'm a Christian but I don't want someone who I don't know living in my house who will have visitors. I work with kids and I get sick from anything they have. I don't want to give her anything. I can't care for her. I don't think I'm wrong to feel this way. What would you do?

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She never had surgery. Heart attack apparently. Was only supposed to be temporary but now has no other place to go but has people coming in and out like she's lived here her entire life. Her family. Not just rehab. I will be having thyroid surgery Thursday and a breast biopsy next month and I don't know what will happen after either, result wise. She keeps asking me all these questions about everything and I'm ready to SNAP. I don't know her. She is not my family and never will be.
I dont think im wrong for feeling this way. How would you feel if you were in this position?
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