Is it creepy or is it ok to date your sisters friend?

It is ok to date my sister's friend. I find someone very attractive and I think I want to ask her to date but she is a friend to my sister. I think it is awkward, but my other side of my reason is ok but tread lightly. I don't know if I just a creep or it ok and be normal person. I want your opinion
That creepy
No your fine
Depends on situation
Get some courage and go for and doesn't...
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Is it creepy or is it ok to date your sisters friend?
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