So far, Rosa's marriage to Cyrus had taken a great turn since the two of them opened it up to include Alberto and Flora, though only those two up to this point. Cyrus got to fuck both Rosa and Flora, as did Alberto, but Alberto was only allowed to do anal sex with Rosa, and Cyrus only did vaginal sex with both girls. Alberto had no such restrictions with Flora, of course. Cyrus simply had no interest in anal intercourse, because he thought that it was "dirty".

Alberto had, however, gotten them to agree to include his niece Angelica, who was now ready, after six months of waiting, at age 18.
She knew what her uncle wanted from her, and, in fact, she loved the idea of getting to fuck her uncle, her aunt, and their lovers. Angelica knew that she was bi, just like Rosa and Aunt Flora, who were in an SM relationship of their own (Flora "owned" Rosa's mouth).

Angelica also wanted to be chattel, just like Rosa, and she hoped that the 3 who dominated Rosa would want to control her body too.
Alberto also told her that Cyrus didn't engage in anal intercourse, so she thought that it would be great to change his mind, so all 3 women, including herself, would get to feel his nice, large dick inside their butts. There was supposed to be a meeting to initiate Angelica, and she planned to act there to see to it that the remaining limits on sex within the group would be lifted.

As the session began, Angelica told them that she wanted to experience all four of them that very night, so she could be part of a complete pentagonal relationship sooner instead of later.

"You guys, I want to be a slave, but who is to be my master or mistress among you? I guess that tonight will help me choose my masters and my other partners."

She immediately unbuttoned her dress, to reveal crotchless panties, and bent over, to invite the men to fuck her in any hole.

"Well, guys, don't be bashful- I need a good lay, and so do you!"

Cyrus approached first, surprisingly, obviously turned on by her voluptuous figure, and her slight resemblance to Rosa. He found her swarthy, earthy skin quite appealing, and he prepared to enter her pussy, when she suddenly moved, and he found his cock pressed against her rectum. He was about to protest that he didn't practice buggery, when she reached behind her, grabbed his dick, and pulled it into her ass.

The sense of her tightness had a shockingly pleasurable effect on him, and he found himself pushing further inside her tush. He was quite surprised at just how much he was enjoying the experience of sodomizing this 18 year old woman. His 9 or so inches found it somewhat difficult to completely penetrate her, but as far as she can take it, she was apparently loving it, and so was he. Rosa felt a little stunned and even envious, because Angelica was getting to feel something inside her that she herself had always craved.

Angelica grunted, groaned, and moaned, as Cyrus's big dick rammed her rectum forcefully. Every time he reentered her, more of him could be put inside her ass, until he was completely burrowed in her bottom. Angelica was really taking it well, as a matter of fact, finding the sense of his full, sizable dick to be quite delightful. She squirmed and sighed a bit, but she obviously loved every single minute of it. Everyone present was too fascinated by this unexpected anal activity to do anything other than watch it take place.

"Oh, Cyrus, your cock is massive- I love it, mi novio! I'm so wet right now, I can't help myself!"

"Are you coming for me?"

"Yes, I'm cumming for you, Uncle Cyrus!"

"I like that, keep calling me Uncle Cyrus!"

"Yes, Uncle Cyrus! You're fucking me so well! I love having your huge cock up my ass, splitting my butt!"

"You like it rough, then, do ya babe?"

"Yes, very rough- the roughest! I'm born to be dominated and used by others."

"Well, that kind of talk makes me want to cum! I'm going to fill your colon with my jizz!"

"Yes, Uncle Cyrus, shoot your sperm up my ass!"

He did just that, filling her tight hole with his cum, and making her extremely wet, so that she came yet again from feeling his seed inside her anus. She moaned with pleasure, and sighed a bit too, as he withdrew from her derierre.

"Ummmm, Uncle Cyrus, that was so great! I love it when someone ravishes my ass like that!"

He now stood limp, after leaving a gap when his dick had been, and everyone saw the semen pouring from her sphincter to her ankles. It was a serious turn-on for the rest of them, especially Rosa, who now saw her chance to get Cyrus to use her anally at last.

"Senor Alberto, can mi esposo borrow my ass for now? I think that he wants to fuck it now!"

"So, do you want to fuck it, Cyrus?"

"Yes, Rosa read my mind. I have really missed out, as you said before. That was a wonderful experience, and I want to have it with my wife too."

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