Very long, Sorry.
A bit of background, I have never really got on with my BILs girlfriend and neither has DH. She is a lot older and quite patronising but also lies (alot). Everything is always someone elses fault and any success anyone has is a slight to her because she's had such a hard life!
BIL is lazy and selfish and tbh we avoid them as much as possible because its easier that way.
She had a car but it had to go back because she couldn't afford the finance, then she bought a cheap run around which died and is languishing on their front lawn. The thing is they live in HA property so rent is reasonable and I don't think they have many outgoings and seem to spend a lot of time out in the pub etc. so not sure money is an issue anymore. They went to Mexico last year and are off to New York soon, so obviously there was enough money to buy a cheap run around if they had wanted. Not judging here if they prefer to spend money on a holiday thats fine, its their money.
DH is working away and will be back at the weekend, BIL phoned him earlier to ask if they can borrow our car for a couple of days. DH is in company vehicle, I have car at home but don't use it to get to work. DH said no as I might need it, I am actually taking the rest of the week off so probably will. BIL knows I don't really use it other than to do large supermarket shops and visit my family who aren't in walking distance, he got quite arsey with DH. Then said knew some friends had borrowed the car a few weeks ago. This is true, but there were special circumstances behind this and they are closer to us than BIL IYSWIM. Anyway hung up on DH after saying he was going to come round tonight to get the keys from me wtf? BIL doesn't drive so it must be his girlfriend who would be doing the driving and I don't especially feel like being tag teamed by them on my front doorstep.
The thing is even if it was convienient I wouldn't lend them the car, its mine. I worked my way up from a crappy £200 banger at 17 to a car I really love and I don't want to lend it to anyone selfish as that sounds. Besides she's not insured and I don't know if her license is clean etc. so couldn't actually put her on my insurance with any confidence that I wasn't lying and invalidating said insurance anyway - besides they still owe us money from a few years ago and she wouldn't pay any charge if there was one.
AIBU to tell them to get lost if they turn up and make it quite clear they will NEVER be borrowing our car? Or am I being ridiculously protective of a lump of metal?