No cell or land phone number = husband or boyfriend. Or her friend might be another man, getting ready for a scam. She may even be a he (just like on GB). Even if shown a picture, can be anyone's picture (just like on GB).
May even hit you for some money so she can get another phone or whatever (her mother is sick and needs a operation, etc).....just to get in touch with you, the great guy that you are.
Don't give her your mailing address, whatever you do. Or your real name, for now anyway.