The Unexpected

Another short story~ Yay :D The girl called Mary has spent her whole life in bed since her body has been too weak for her to move too much, she is able to move from time to time but not so much. She has a best friend, John that confesses to her and promises her to do anything just so that she will be strong enough to walk like everyone else does. One day he brings a medicine, what will be the consequence of taking it?