Presumably you intend to remain as Keeper. That being the case then you are the main driver with her as a named driver. However she will be driving the car most of the time, not the other way round. A clear case of fronting, you'll probably get away with it for a while but if there is an incident and this comes to light then there may be complications later. The insurers would not allow this if they knew so effectivley you are obtaining cover by "deception", that is not a specific offence but the insurers could well argue they are being defrauded and may well refuse a future payout and probably withdraw cover.