My sister my house guest 3

The longer this goes on the more things start happening. I feel like I am just in for a ride and my sister is steering the car blindfolded.

Thursday night I get home and head for the shower. As I get near Sarah's room I can hear talking. I look in her room. There are two people with her and all three are naked.
That fact as you may guess was not a surprise. The fact only one of them was a guy was.
Sarah saw me and called me into her room. She introduced me to Tammy and her husband Ryan.
Ryan wanted to watch me fuck his wife and cream pie her.
I went and had a shower and returned naked.
Tammy was waiting for me we kissed and her tongues went straight into my mouth. Tammy had bigger tits than Sarah, but they were not as firm as Sarah's. I felt her naked breasts press against my chest. Then she dropped to her knees and sucked my cock. Once I was hard lay on the bed I climbed on top, and she wrapped her legs around me as I started to fuck her.
I will tell you I love my sister, and I love fucking her in the bottom. But there is nothing that beats the sweet feeling of a pussy on your cock. I am kind of shy and don't go out much. So, this was the first pussy I fucked since my wife left me.
I was kissing her on the lips and then asked her to get on top. Once there I started sucking on her breasts. Then I came in her pussy. Afterwards she rolled got a vibrator and started giving herself an orgasm.
We sat around and just chatted about the latest news for a few minutes before Sarah came over and sucked my cock until I was hard again, they then had me fuck Tammy again.
This time Sarah and Ryan started doing the same next to us.
After they had finished Tammy and Ryan went to have a shower and get ready to go home. I noticed the spoof leaking from Sarah was clear. She told me Ryan was firing blanks, and they wanted me to get Tammy pregnant.
I lay on her bed thinking what it be like having a child with none of the responsibility, no child support payments no running around after them.
Just then Sarah got on top of me in the 69 positions. She wanted me to lick her out. When I hesitated, she pointed out there were no sperms in her pussy just fluid.
In the end I licked her out just to make her happy. I didn't taste as bad as I thought it would. While she sucked me off. Afterwards we lay naked holding each other and she kissed me on the lips.
Sarah took Friday off. She had not slept much and was exhausted.
When I got home that night Ryan and Tammy were back. She was due to ovulate today. My sperms from last night would still be alive and swimming around. Now she wanted some more.
After I had a shower, I found myself having my cock sucked by Tammy while her husband and my sister watched us. Then Tammy went down on Sarah while I fucked Tammy from behind.
After I shot my load in Tammy she got up and kissed me on the lips. I could taste Sarah and Ryan's cream on her lips. As we were kissing Ryan got on Sarah and fucked her.
Tammy and I watched them.
Then it was our turn again. I got on my back and Tammy got on me. I went hard on her nipples sucking on her tits. After I had cum in Tammy, I took her back to my room and we went to sleep in there Ryan stayed with Sarah and they slept in her bed.
The next day they stayed, Ryan walked around in undies and a T-shirt as I did, Sarah in her tank-top and miniskirt and Tammy in a lace bra that was very see-through and peek-a-boo undies. Those are the women's undies with the big slit in the front of them.
At one point Sarah brought out a strap-on dildo and started fucking Tammy on the living room floor while Ryan and I watched them. Then they swapped and Tammy fucked Sarah.
As I watched on, Ryan got up and went over, he started fucking Sarah. Tammy changed the dildo and put on a smaller one which she lubed. I thought she was going to Fuck Sarah in the arse but she started pegging her husband instead.
I looked at Sarah hoping this was not going to give her any ideas and she winked at me.
After that Tammy and I went to my room, and we fucked on my bed While Ryan and Sarah went to her room. As I was fucking for the first time without an audience, I took my time and closed my eyes and really enjoyed the feeling of a wet pussy riding my cock. Sunday day morning we were in our home clothes again. After lunch Tammy and Ryan went home.
That night Sarah asked me to come to her bedroom One on her bed she sucked my cock until I was hard, she then climbed on top of me. I felt her guide my cock to her pussy. I was going to say something, but she shushed me and put a finger on my lips telling not to speak. I was balls deep in my sister's pussy and she started riding me. I knew it was wrong and held on as long as I could. But even so all good things come to an end, and I shot my load in my sister. She lay on top of me silently crying until she fell asleep.
Monday morning Sarah got up and went to work.
I lay there alone asking myself if I could get off this ride would. Could I give up fucking my sister or the people she was going to bring home with her?