Slight deviaton from the schedule

Sorry, I had initially planned on writing a story about a dinner seduction however I am compelled to write about a night a had a about 2 years ago. My wife and I have always taken in strays when we could, sisters, best friends and in this case a coworker that was down on her luck. I will call her Sarah (not her real name) for the purpose of remaining anonymous had just started a new job and was a single mother with nowhere to stay in the immediate area. We opened the doors to our home and allowed her to stay with us for as long as needed until she got back on her feet. Sarah stayed in our guest bedroom and used the guest bathroom and stayed to herself most of the time. She was pretty in her own ways, she had beautiful brown hair that hung at her shoulders, ample breasts and a very nice round ass. Most of the year spent with us was uneventful however occasionally she would afford me a glance at here big round breasts hidden behind tee shirt material but without a bra. I could make out the vague outline of her nipples and aureole when I glanced at her and for a split second I think she realized that I might be checking her out but strangely enough she didn't say a word. There were nights I would stroke my cock as hard as I could thinking about her making her way into my bedroom and crawling under the covers with me. My wife works the night shift and was not frequently home during most of this time which allowed me free reign to fuck myself as much as I liked without having to explain myself. As a rule I always close the door to my room for privacy and out of respect for Sarah however the latch on the door did not secure tightly and the cat let herself in without my knowing it. I remember picturing Sarah straddled over my face wearing here opaque black thigh highs an parting her smooth shaved pussy lips to expose her large clit. As I pictured her sliding her own well lubricated finger in her ass as fast as she could while I licked her to climax and drank her cum.... I must have been making a bit to much noise. As I shot a huge load of warm cum all over my belly and chest I glanced up into the mirror across the bedroom to notice a dark figure dart away from the doorway quickly. Was she watching? I could picture her standing in the dark with her hand down her pajama bottoms working her clit as fast as she could, her own juice running down her thighs. I quickly got up and cleaned up the cum on my chest and stomach and walked out into the hall. Her door was closed. As I turned around to head back to my room I heard the singular most erotic thing I think I have ever heard in my life. In the silence I heard an escalating "ooooOOOHHHH!" followed by silence. SHE HAD JUST ORGASMED! More specifically orgasmed after watching me get off. I was elated to know I could turn her on. I pictured her fingers sliding in and out of her wet hole while her other hand worked her clit rubbing in ever narrowing circles until the final moment where her pussy gushed her own cum all over her fingers and the futon. Had I been in the room with her I would have immediately sucked her juices off her fingers tasting her saltiness in my mouth. Alas nothing had happened afterward but I have often thought about texting her to just say " I know you were there", But that is a different story all together.