I figured that this must be the best method! It hadn't occurred to me that she might use the riders pegs to hoist herself up. Good advice!
Has anyone got any horror stories about pillions getting on the back? I once had my friend use the rear footpegs to get him up. Hes significantly bigger and heavier than my girlfriend, and I wasnt quite expecting him to be that heavy! He damn near made me fall over before I managed to get myself upright again.