black/distort her face out of the pictures... that way she cant compain (remove her whole body if she really objects) then if she still complains, she doesnt sound like much of a friend, write i witty remark like,
'ther should be 5 of us in thi spicture, howver iv had to remove one of them for freaking out...
or perhaps a comedy message like,
'whoever guesses the missing person wins.... well, they can keep her, hmm actually i suppose that means you lose..? sorry folks!!!'
Robcampo