So DH and I have one car between us. We had two but then we sold my old one and kept the one that we bought in his name but still together. He mostly works from home but we live near a train station so if he has to go in to the office can just get the train there. I am the main driver and use the car for work, taking DS to nursery, trips out with DS on my days off etc.
MIL told me last night that for Christmas she has got DH a personalised registration plate. He has recently bought a bike and I thought she meant for that as a jokey gift but she said it was for the car.
I'm not the biggest fan of personalised registrations anyway and would never get one. I know they can be really expensive too and I can imagine this one was. She has got his first name spelt out in letters and when I remarked that people might think that was my name as I drive it more she said "Yes, but he does own and pay for the upkeep of car so it should really show don't you think?" I was a bit at her comment and said that actually DH used our money to buy the car and we use our money to pay for the upkeep. At that point DH walked back in to the room and we stopped talking about it.
Then after we got home I got a message off her saying she was upset by my reaction and is considering taking the plate back. I doubt she can do that but whatever. She said she thought DH would love it and that it would be unfair of me to not give him the decision of whether or not it goes on the car. Also she said that men in white vans would be less likely to cut me off when driving if they think it's a man driving  I happen to know that DH doesn't like personalised registrations either so I doubt he'd want to put it on our car. It was late so I didn't reply.
Can anyone help me think of something to say to her about it. Or should I just tell DH and let him deal with it? AIbu to be annoyed that she knows i drive it the most but thinks it should be labelled as belonging to DH just because his name is on it?