如何拒绝这邀请?

My daughter (10 years old) got invitation from her friend (classmate) for sleepover party. The girl's mom called us to invite my daughter to come to her house for sleepover. I don't want my daughter to sleep at someone's house which I don't know the parents. So I told her we had something to do in the following day and my daughter cannot do sleepover. I gave her my email account to ask her to send me her home address, however, she didn't. Today I called her again and she told me the address. I did google map and found the house was in very poor area. I don't judge people based on their wealth but that neighborhood still makes not want to send my daughter to there, especially we (parents) are not invited. On the first phone conversation, I told her my daughter will be there for party, now after finding her house location, I am hesitate to let my daughter to there. How can I turn down that invitation now?
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