My wife fingered herself while she thought I was asleep

So my wife and I have a great sexual relationship. We have sex atleast a few times a week. And we’re one of those couples that are okay with each other pleasuring ourselves if we want to. We even tell each other when we do, it actually gets us going. My wife will use a little gold vibrator but she never uses her fingers, I guess she just doesn’t like the feeling of it, and would rather have the feeling of a vibrator on her clit.
So last night we were laying in bed after a long day. We watched a little TV and at some point I passed out. I ended up waking up to the movement of my wife settling into bed. She had turned the TV off and the room was pitch black. She was laying on her back and my arm was around her and was softly laying over her right forearm. I didn’t move and laid still thinking that we were both settling back into sleep.
After about a minute, I felt my wife’s arm lower slowly, and my arm followed with hers. I heard the waist band of her panties let out a tiny “snap” sound. My wife’s arm paused for a few seconds, probably waiting for me to wake to the sound. I laid still, now very curious as to what was happening. After a few seconds my wife’s arm lowered a little bit more and I could tell her hand was now fully into her panties. How my arm was positioned I could feel my wife’s hand start to move, slowly at first and then a little bit faster.
My wife was playing with herself with me laying right next to her.
My heart was beating out of my chest and thankfully I wasn’t laying with my crotch resting against her because she would have felt my member get rock hard. I tried to control my breathing and listen and enjoy what was happening.
My wife’s hand continued to move at a constant rate and I could begin to hear her breathing get heavier. She was really getting into it now. She rubbed her clit for what must have been atleast 5 or 6 minutes. And then what really made me almost burst was when I felt her arm go even lower. And that’s when I heard the wet sound of my wife’s fingers enter her pussy. 
I’m not sure how many fingers she put in herself, but when she did she almost gasped out loud. She arched her back a little and the air sucked out of her lungs. I listened to the amazing sound of her thrusting her fingers in and out of herself, hearing the wet sound of her beautiful pussy. After a few minutes, my wife’s entire body started to slowly vibrate until she was shaking uncontrollably from the orgasm she was giving herself. I have to hand it to her though, she was able to stay silent as she gave herself an amazing orgasm. 
My wife then settled into bed and I could feel the rapid rise and fall of her chest. I then felt her raise her hand up, with my arm dropping off, and the next thing I heard took my breath away. I heard my wife’s lips smack and the sound of her tongue as she licked all of her juices off of her fingers. I’m used to my wife wanting to taste herself, be it off of my tongue or off a dildo or my fingers, but to listen to this that night was one of the hottest things I’ve ever heard. 
Afterward she settled into sleep but I turned to the other side facing away from her. I needed to collect my thoughts with it continually racing through my mind what I just heard. And most of all, I needed to hide my rock hard boner she gave me.

Source: reddit.com/r/Erotica/comments/s340sa/my_wife_fingered_herself_while_she_thought_i_was