the driver and a woman were having a regular rendezvous in the back of the truck.
@billybob : I don't doubt you at all because DECADES ago, when my husband and I were first married and I was supporting him through grad school, we were renting an upstairs apartment in a pre-1900's house that sat at the top of an obscure, dead-end street. There were only 4 other houses that wound their way up that street.
The neighbors and I kept seeing a strange jeep parked in our parking area, and a blond woman using it. Problem was, we each assumed she was a friend of the others and didn’t ask.
Until one day she parked in someone's spot and it honked them off. I got a knock on the door: "Could you tell your friend to blah, blah, blah...."
And we had this whole, "She's not MY friend, I thought she was YOURS!" "Nope, she's not mine!", etc., etc., etc., So I go down to the house of the woman who is home during the day, and she spills it: "Quisp, she and the mailman are having an affair! He parks his mail truck right outside my house, she gets in it, and they go at it! All while all of you are gone at work!"
Long story short, the neighbor never said anything because her house was HUD housing, and she thought if she made waves, her family would lose the house. And they were the sweetest family!
Well, Quispy here didn't stand for it and made waves! The next morning when I left for work, I put a sheet of notebook paper under her windshield wiper that said in large letters, "If I see this vehicle parked here ever again, I'm reporting EVERYTHING TO THE POST OFFICE!"
The mailman had a cow, according to the neighbor who had spilled the beans to me. But we never saw the blonde and her jeep again.