Stay late, with Gina

The next day at work was interesting.
Dan didn't say anything to me, other than the normal day to day chit chat, and I noticed he seemed to treat Gina no differently than he had previously either. If that was the first time, you'd think there would be some tell, but no, I couldn't pick up anything. Perhaps they'd been doing it all along?

Gina however smiled at me even more broadly than normal when I arrived, and I'm sure she winked at me. She came into my office several times, with various reasons; though they all seemed rather contrived she didn't bring up the night before, and I began to wonder if she hadn't seen me at all.

I decided to go and ask Gina to stay late "for work" as I'd fantasised with my wife last night. I hopped up from my desk and wandered out to see her before she left for lunch. She was sitting at her desk as normal and I walked up beside her. "Hi Gina,
are you busy tonight?"
"No, I don't have any plans yet," she replied turning her head and smiling at me.
"Good. I need you to help me with some work after hours, if that's okay."
The thought of fucking her in my office was having the expected effect and my cock was swelling in my pants.
"Oh, that's no problem at all," Gina began, then looked down to her arm, before looking up at me again, "in fact, it'd be my pleasure, but I've got to meet a friend for lunch in a few minutes, so I've got to go now. See ya' later though."

I was still standing by Gina's desk when I received a text from my wife, simply "hey baby, having a good day? ;-)"
I mulled over the meaning for a while, what did the winking face mean? before replying.
"Pretty good, seen a lot of Gina today."
I received numerous texts in response but didn't reply to them other than to send a winking face.

I went back to my desk to eat my lunch and tried to focus on my work so that I'd not be too far behind by the end of the day.
The time went slowly, and I found myself checking the clock frequently, and staring out the interior office window to catch a glimpse of Gina at her desk. Eventually, five p.m. rolled around and everyone quickly packed up and left.

I opened my door and looked out to see if I could see Gina , but it appeared she'd disappeared. Damn, I guess she forgot.
I shutdown my PC and was just about to get up when I heard the doors to the toilets shut and then a few seconds later Gina walked in to my office. She was looking even better than she was during the day, having let her hair down, and touched up her makeup.

"Hey, so, what did you need me for?" she asked smiling at me brightly.
"Uh, well..." what am I doing? She's actually up for it. Am I going to actually go through with this?