Facebook cover photo...?

[john]

Alice, you are right in being concerned enough to ask this question. You show that you care about your niece by being worried about her privacy.

The truth is, is that it really isn't up to you. You need to ask the parent's of the child. Ultimately, it is their decision.

I highly doubt they would have an issue with you using the photo, especially since most new parents post millions upon millions of photos of their babies all over Facebook anyways. Even so, it would still be a good idea for you to at least ask. They will most likely say it is fine, and then you have nothing to worry about. Afterwards, they will be glad you asked, and it will show them that you really, truly care about your niece!