Cat and the Shemale cock 3

From that point on I spent a lot of time at Cats place. My roommate told me I was the luckiest guy in the universe to be getting a piece of that and I could only smile and agree with him.
We fell into a routine I would get her off three or four times every morning with the occasional fifth time if things got really frisky. She would text me some days between classes to fix her cock issues for her. Then we would always have lots of fun in the evenings between dinner and studying.
One day a week I would go game with my buddies and Cat never seemed to mind but the moment I got back to the apartment she would be fucking my throat within minutes of walking in the door.
Things were going really well, I was doing well in my classes and so was Cat. We were happy and there were no complaints. Then one day her sister showed up and things got interesting.
It was a Thursday and I had no classes that afternoon and had just got back to the house after taking one of Cats huge loads. She had gone back to class and would not be back for a few hours and since I was caught up on my studying I was going to sit down and read a new fantasy novel I had just picked up.
I unlocked the door and stopped dead in my tracks when I saw a woman standing in the middle of the living room. I stood there dumb as a post staring at a woman who was as beautiful as Cat but in a different sort of way.
“Who are you?” I squeaked out.
She coolly looked back at me with an amused little smile.
“So you must be Keith, Cat can’t stop talking about you, and by the way I am Marty, Cats older sister.”
I gathered my wits, “I can see the resemblance,” I said.
Marty was at least two inches taller and had even bigger tits than her sister.
She got an even bigger smile, “In more ways than one my boy in more ways than one.”
My eyes widened at the implications.
“So tell my why haven’t you let my sister fuck you in the ass?”
Her question startled me with its directness. I had never really considered the idea.
“To tell you the truth I don’t know the topic has never come up.”
“Men are so selfish.”
“Hey she has never asked or even hinted she wanted to fuck me up the ass. Mind you thought is a bit scary with that monster cock of hers.”
Marty smiled slightly.
“It does run in the family and I can understand you being a bit scared of her cock. The fact you let her throat fuck you is pretty amazing as it is.”
I smiled at the thought. Then moved into the kitchen to get a glass of water.
“Do you want something to drink? We have some different things in the fridge.”
“A beer would be nice,” she said with a smile.
I opened the fridge and let her know what we had. She decided on a Sierra Nevada Krystalvise and I went with a Black Butte Porter instead of water.
We sat down on the couch to talk when the phone rang and I picked it up.
“Hello.”
“He baby just calling you between classes. I forgot to tell you my sister Marty is coming into town today. You don’t mind if she stays with us do you?”
“No not a problem she’s here now and were just going to chill.”
I heard squeal in delight.
“Great I’ll be back after my last two classes end, but in the meantime if she needs anything can you take care of her?”
“Like what?”
“Same thing you do for me. She’s got a similar condition. You’ll do that for me won’t you baby?”
“If it comes up I guess I can help out.”
Another squeal of joy. “I knew there was a reason we met. See you later love ya.”
“Love you to.”
I hung up the phone and turned to Marty and said.
“Cat will be home in a few hours after she finishes her classes for the day. What would you like to do there are some good movies on the DVR?”
“No, what I want you to do is suck my cock.”
Her bluntness startled me.
“Your not afraid Cat would get mad?” I asked.
“Hell no. If I know my sister she asked you to take care of me just like you help her out every day.”
Seeing me blush she just smiled.
“I am right am I not?”
I just nodded my head.
She stood up and pulled down her skirt and panties revealing a huge cock that was even larger than Cats.
“Well don’t just sit there you little cum slut bitch get over here and service me. I have not had a good blow job in months.”
I obediently got up off the couch, crouched down in front of her and wrapped my lips around the head of the monster between her legs.
I heard Marty gasp and then moan.
“Fuck yes Cat was right you are a natural cock sucker. Just to let you know I am fifteen inches long when I get hard.”
I just nodded my head and worked the shaft with my tongue. I also noticed she was probably thicker than Cat.
“As for cumming my little cum bucket whore, I can’t cum as many times as my sister but I come more and harder. I can still get three or four out each day.”
My eyes widened at that when she grabbed my head and forced her took down my throat moaning as my throat muscles milked her cock. She continued to push deeper and deeper till her balls were slapping my chin.
Then she really got aggressive and started to fuck the shit out of my throat.
“Oh my fucking god your throat is amazing. Cat wasn’t wrong you’re a natural born cum slut.”
She then picked up the temp pulling her cock all the way out of my mouth and then ramming it back in to the hilt.