An appropriate gift for a 15 year old??

Ok well my friends daughter is turning 15 next week..They are very different my friend being very outgoing and loud. Her daughter is very shy and i guess a bit of a nerd.. My friend is always telling me how she wishes she would go out with boys and do things 15 year old girls do rather than just be reading..Anyways my friend told me what she was going to get her for her 14th birthday and i was like OMG.. She said she is going to get her a vibrator! I mean i dont see anything wrong with them but i dont think its appropriate for her age..I didnt really say much just kinda gave her a weird look.. And im sure she was serious she sounded serious at least.. Do you think i should tell her something i mean it is her daughter but i think she might embarr her daughter..idk.. what do you think?