dont do it!! You never know what the future holds, I would suggest something else that represents her such as her fav flowers or something that she is really into. Not only do you not know what the future holds it is hard to find a really good artist that can do a tat of a face that is super realistic and you may not be happy with the end result. Also I started getting tattooed at a young age and have had several things covered, they never look as great as a cover up as they do when you get it right the first time!