<human>: Me and my girlfriend are currently in a long distance relationship for the summer. We're only really able to see each other every couple weeks for now.

A couple days before a planned visit, we were talking about how horny we were. Of course, this turned into a conversation on all the things we wanted to do to each other. We weren't going to have the most privacy at her house for the weekend, so I brought up the possibility of car sex. I jokingly said something along the lines of "We should totally do it, since we haven't yet."

She replied "But we have?"

I said "You're right, I guess you did give me road head a while ago."

She then said "Well, yeah. But what about that time in the parking lot?"

I responded "What time?"

She continued "In the parking lot behind 7/11? You don't remember? It was a lot of fun.."

I have never done anything like this with her.

So I responded "I think you're remembering the wrong person."

She said "OMG! This is so awkward. I don't know how I made that mistake. I'm so sorry!!!"

Not really sure what to make of this. I'm 99% sure she wouldn't cheat on me (various experiences we've gone through). But at the same time, it kind of stings.

Thoughts?

Can you give me the gist of the text in a nutshell?
<bot>: Girlfriend made the mistake of bringing up a past sexual memory and thought I was a part of it. I wasn't.