So I used my BF car to go to work yesterday and when I got home I parked behind his sister when his dad was leaving for work he backed into my BFs car. He says I was parked between the two vehicles which I don’t think I was or if I was I didn’t realize I was. (I’ve been parking behind her in the same spot for the past week) well earlier he texted me this am I wrong for not initially apologizing?

I should add the way his dads driveway is it’s enough for two rows his dads truck was on the front left sisters car directly on the side of him front right. I parked behind the sister on the right side. His dad hit only the back fender of the car and missed the entire front end. (I have no problem admitting when I’m wrong but I don’t think he has a right to be mad at me)