If she does not want to get noticed,whats the point of getting a hot hatch?? Any thief will instantly notice its not the standard version anyway just by looking at the body trim,interior trim bigger tire size and the brakes. Surely its better to just get the normal version of the car,and probably one which is slightly used??
Its not like many family sized hatch back struggles to even do 80mph on the motorway nowadays.
I honestly don't find the concept of huge amounts of power in small cars that safe,even with the larger tires and larger brakes - if you really want that power you want to drive fast,and the cars simply don't have the mass of metal to protect yourself if you have a crash.
If you are not driving fast or taking it to a track that is just all that extra power not really doing much. Then its basically extra money on fuel,parts,tax and insurance.