My Stepdaughter

Last Saturday night I planned to go out with a few mates down the local pub.
As soon as I started drinking i just didn’t enjoy it so made my excuses and left.
I went around the back of my house because i hid a key so I don’t have to take any with me.
I walked around the corner in the dark and noticed the living room light on so i leaned around and had a look in incase my mrs was there watching tv because I enjoyed making her jump.
To my total surprise it was my grown up 24 year old stepdaughter giving her boyfriend a blow job,
He was standing over her while she knelt down almost sitting on her heels.
He was holding her head with both his hands and thrusting into her mouth.
I couldn’t stop watching,
I was rock solid in seconds and needed to take it out to ease the pressure.
I couldn’t believe she was that dirty sucking his dick with the lights on and curtains fully open.
I knew they couldn’t see me because how dark in was out side which ment all they could see was there own reflection .
My mrs must of gone bed early.
My stepdaughter stood to her feet and lifted off her tee shirt but left her black lacy bra on,
Her boy friend turned her around pushed her forward so she was leaning on the arm chair.
He pulled her knickers down and sniffed them before dropping them to the floor.
He was a tall skinny kid and really quite shy and there he was naked from the waste down with this huge dick pointed straight at my stepdaughter’s pussy.
They were side on to me so i had a perfect view of him sliding into her,
He had hold of her hips and was pumping hard.
I was now wanking like a total pervert.
Her boobs had fallen out the top of her bra and bouncing all over the place.
The forced of his thrusting made her arms collapse and she pushed her face into the chair to muffle her moans.
I couldn’t take anymore and pumped so much cum into the air not caring where it landed.
He must of been close to cuming to because he stopped and quickly lifted her up to suck him and he thrusted about 4 times and pushed deep into her mouth making her gag but he was cuming and didn’t care.
She surprised me by taking all his cum and not wasting a single drop.
As soon as she had swallowed all the cum
He lay down on his back and she positioned her pussy above his mouth like it was a usual thing after he cum.
She was leaning forward legs stretched out behind her and resting on her arms almost lift a press up position.
She was grinding her pussy hard back and forth on his face.
Her ass looked amazing and I started wanking myself again.
She was grinding hard and her ass cheeks tensed up as she started to orgasm.
She slowed to almost a stop and sat up and parted her pussy and he ran his tongue between her lips the look on her face as he reached her clit made me cum again.
They got up ,dressed themselves and i put my dick away.
Once all the action had finished a fought came into my head.
WHY DIDNT I VIDEO IT ON MY PHONE!
So that’s my plan next time.
I made as much noise as possible coming in the back door and they didn’t even move as i said hello,
I said good night and went to clean myself up before bed.