Same for us. My girl unfortunately always lies down on my husband's lap (he's the driver). When we got her 6 years ago I bought a harness that I would clip to the middle seatbelt (on back seat), but my husband didn't like it cause he thought Nuki was happier on his lap, so he kept unclipping her each time I secured her before sitting in the car.

It was so frustrating, he just didn't want to understand that it was safer for her to be restrained in the middle of the back seat. After almost a month of fighting over this I just gave up. All I hope is that we'll never have a car accident.