I F22 had a sleepover with my coworker F23 [FF]

Skip the first paragraph if you don’t want context.

I have to write this down, I have to remember every detail. And I want to tell someone but there’s no one I can tell, given the slightly immoral nature of it. We work together. She’s objectively a beautiful girl. Very sweet and genuine, comes off a little shy, but getting to know her she grew progressively more flirtatious and forward. We’ve become very close friends. Hanging out after work when we can, usually smoking in a car, in an abandoned parking lot, tensions high. These late night conversations couldn’t help but elicit conversation of our shared attraction, how fun it would be to play together. She’s never had any girl on girl experience and is definitely eager to try. I on the other hand, although I have some experience, still feel like I need more. We’d reveal all our secrets about each other. Our wet dreams, in which we’d get so close, I’d climb on top of her but never did anything because it wasn’t allowed. Our fantasies, where I’d massage her, moving me hands over her back, over her ass, spreading her legs apart, getting her so worked up, she’d have no choice but to accept my fingers inside her. The tensions had become so intense I once came to a video of her singing… And in the midst of these conversation we unfortunately would always have to remind ourselves that we’re both in relationships. Good ones too. Once I tried to set boundaries with her but that quickly fell through. We couldn’t help it. Flirting with each other. Wanting to touch legs or fingers every time we got the chance. The tension had been building for weeks.