I would personally get a blank piece of paper and doctor it into a doctors prescription with some made up medical name like Liberian Tetsefly Rash and leave it prominantly where she can see it, thus fooling her into thinking you have Liberian Tetsefly Rash, also known medically as LTR. It is a very rare skin inflamation that is cause by the Tetse fly which is in the UK as global warming continues. For effect, leave a Wikipedia page, forged, referring to LTR as you are keen to read up on it.
If she believes that, charming the Alan Whickers off her should be a doddle.