Carl anxiously awaited Miriam's return. Things had gone a little differently than the two couples had originally thought... for one, swapping wives had brought their marital sex lives to incredible new highs. Just watching the tape of Kevin and Paula had made Carl incredibly jealous and turned on, about halfway through he stripped her and they began fucking on the floor of their TV room... when they got the part where she was Kevin's first anal fuck he completely lost it in her pussy. To his utter shock, after he pulled out of her hot pussy, Paula cleaned his dick off with her mouth and even went on to give him a blow job. Just that fact that it was her made it the best blow job of his life, even though Miriam might have had better technique.
The tape of him and Miriam got Paula going and that night she hopped on top of him, not even trying to convince him to be on top. She fucked him like a wild animal, even asking him to bite her nipples as she rode him... he couldn't believe the different. And the best part had been finishing in her ass, as she pulled herself off of him and then began to fit him into her ass and riding him like that. Usually for anal sex she insisted on being taken doggy-style or to be on the bottom, but his favorite position for any kind of sex was with her on top, and having her butt-fuck riding him was incredible. Their sex life all week was amazing, they fucked every night and there were some day time rendezvous as well!
When he talked to Kevin he found that his experience with Miriam was similar... except for one thing. She was now extremely jealous that Paula had been his first anal experience. Not that she wanted Kevin to take her now - she couldn't be his first so she didn't want him to be hers - she wanted Carl to take her anal virginity. At first Carl was concerned that this might have backlash on all of their relationships, but Kevin said that he was perfectly ok with it as long as he got to sleep with Paula again. Carl said he'd talk to his wife about it.
Both of them tried to be perfectly honest with each other, after all they didn't want to mess up their own marriage or sex life by doing this, but both of them admitted that they'd been turned on by their experiences and were curious to see what it would be like to try again. Even more hesitantly, Carl admitted that he'd been turned on watching Paula sleep with Kevin, and blushing, she admitted that she'd been turned on by watching him with Miriam. As long as neither of them was feeling jealous or upset, they decided that it would be ok to try again.
Miriam was looking just as sexy this time, dressed only in thigh-highs, a garter belt and heels under her coat and she turned and bent over, the garter belt framing her ass perfectly.
"You look fantastic," he told her, admiring the heart-shaped ass, knowing that he was going to be the first to ever enter its sweet confines. The remembered rejection of his exploration last week made him even more lustful, his cock already hard and twitching in front of him.
Taking a deep breath she put a seductive smile on her face, "Let's do this," she said and reached up to kiss him. They kissed passionately, she seemed a little desperate as their tongues entwined and she pressed against him. Running his hands down the smooth skin of her back and over the garter belt around her hips, he gripped her ass cheeks in each of his hands and she shuddered, moaning. Her tone sounded both anxious and excited.
Pulling away he looked her in the eyes, "Are you sure that you and Kevin are ok with this?"
"Yes," Miriam smiled, "Don't worry about us... besides, he's going to be introducing your wife to some new things tonight too."
Carl's eyes widened and his hands squeezed her cheeks even harder, making her yelp a little, "Like what?"
With an innocent look on her face she shrugged and he squeezed again, digging his fingers into the tender flesh of her ass and making her press her hips against him as she squealed, "I don't know! He just said that they were going to try something new... something about her wanting to try being restrained."
The idea of his wife being tied up or handcuffed or hog-tied or something similar, and then fucked by his best friend made his dick throb with lust. Which was, of course, going to be taken out on his best friend's wife. With a lustful snarl he pulled her close to him again and began kissing her hard, she responded with enthusiasm as his hands kneaded the firm cheeks of her ass, his fingers pressing inwards towards her virginal hole.