<human>: About 2-3 months ago, after a friend's birthday party, I drunkenly called over a coworker, and long-story-short, we had oral sex that evening and the morning after.  Hooking up with "Jess" was easy, meaningless, and insignificant to me. This wasn't the case for her, and we've since had a falling out based on a misunderstanding of expectations going into that scenario. That all said and done, Jess is  still in the same department as me at work, and I still see/interact with her from time to time, albeit as little as possible. 

Fast-forward to last month, and I've started seeing a really nice, sweet girl that we'll call Jordan, that works in my building, but not in my department. Things are looking to be somewhat serious, we've gone out a bunch of times since then and it really feels great, I'm planning on formally asking her to be my girlfriend soon. However, my conscience tells me that this incident with Jess is something that should definitely not be kept from Jordan. I think it's important that there not be secrets like that kept from someone you trust intimately. 

The problem is, I don't know how soon is too soon to tell her, I wouldn't want her to become spooked, or see me in a bad light because of that decision. Should I make this situation clear before I ask her out? Should I tell her down the line when I feel the moment is right? Or should I not tell her at all?

Thank you for your time :)

Can you provide a brief overview of the text?
<bot>: Hooked up with coworker Jess a few months back, now 'seeing' Jordan, a girl we both work in the same building as. When do I tell Jordan about said hookup without scaring her off?