Annoying murmaid friend?

i don know what to do i have a 13 yrs friend and she actually wants to be a Mermaid and i say to her get a grip you cant really posses powers and turn into a Mermaid like the girls in h20 just like water shhes she bugs me all day to find a real spell for her she isn't joking she really wants to be a Mermaid im not KIDDING SHES DRIVING ME BANANAS IS there really a real spell deep in this world some where im a christian i tol her already t urning into things are evil i dint supports at all shes really weird i tell ya