Ah excellent! Yes you need to be gentle with her!
In your part of the world people seem to walk along the sidewalk above the long Tableview/Blaauwberg Beach stretch, which is flat and has restaurants to stop for a drink.
A bit further away is the Sea Point Promenade...
More my side are these Constantia green-belts. There is also the flat Tokai Forest loop of about 4km with a Secret Cafe selling coffee and pastries most days, about half way around.
Then there's the Muizenberg to Kalk Bay walk past St James - but that is a proper drive to set up!