i dont think youll have a problem as i assume the car will primarily be at your house. i think they only get a bit sniffy if the car stayed with him an he was usuing it as his dail transport. thats when they start asking questions an wanting trackers etc.
i have my sister on my ins as once a year she needs to take me for my spinal injection and the dont let you drive after and she lives 30 miles away. its cheaper than a cab lol.