I was not 18 yet. My dad was struggling from a nasty divorce. My mom turned evil, cheated with his best friend and left us both to run away. This left my dad a depressed broken man, he started drinking a lot, gained some weight. He was buff in shape before, worked out in the gym daily.
He never got mean, thankfully, just sad, really sad. One day we are watching a movie on cinemax, and both fell asleep. I woke up and saw there was a late night porn playing. I started touching myself while watching.then out of the corner of my eye, I realize my dads limp cock is out. It had slipped through his boxers because of the fan. he always cruised around like this at night. Never bothered me.)
No idea what took over me, but I leaned in slowly, watching to see if he would wake up. Then gave the top of his cock a peck. Then a second. Then a lick. I grabbed it and slowly pushed it in my mouth and out. I continued sucking and licking his cock and felt it get hard in my mouth. I stuck my tongue through the opening in his boxers and licked his balls. This was all turning me on so much!
After about 30mins of slow passionate blow job, my dad cummed in my mouth and I swallowed him dry because I love cum!!
My dad never woke up during it. The next day I noticed a little chipper in his attitude. He was in a stunningly amazing mood. This made me feel good that I accomplished something to make daddy happy.

So I continued. At least 3 times a week. 3 years and he still has no clue that I suck his cock while he sleeps.

Recently, my mom came back into the picture.. .not with my dad by any means, just wanted to see me. O e day we are hanging out, and she asks how dad was so I tell her "well he has been a lot better since I started sucking his cock when he falls asleep!" she was outraged. Exactly what I wanted. Hehe. She was tempted to yell at him but I told her it was all me and he had no idea. Since I am 19 now, there's nothing she can do about it. I also told her that sometimes I rub my clit with his cock and slide it in, just for a few minutes and ride him while he sleeps on the couch or in his bed.
Hahaha I haven't heard from her since I told her that.