Wrong Van?

so my DAD tells the story like this, from his words:

We went to a high-school basketball game in Castleford. Great game, home team win and all. It was a nasty nasty night, so I left the game a minute or two early to go get the van warmed up and move it closer so your mom didn't have to walk so far. 

I pull up to the curb fairly close to the door where she would be coming out and parked there with the engine running. Soon the game was over and people started flooding out. I kept watching for your mom to come-- but didn't see her.  But I did see a nice family coming my way...their car must be close too.

Pretty soon the front passenger door opens, as does the rear slider. and in gets a mom and 2 kids. They are chatting away about the game...while looking suspiciously around the van...seat belts on already. Then they look at the driver...ME.

All I said was, "Wrong Van?"

They hurried out of the van and never looked back.

After my mom got into the van, he says he could hardly tell my mom what happened through his fits of laughter--remembering the looks on their faces.