All characters in this story are over the age of 18 and fictional.
I'm open to fair and constructive criticism.
This is a much shorter story than I've written so far. I'm willing to do a part 2 if people are interested.
Hope you enjoy it.
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I'm a 25-year-old guy named Sam. I started dating a woman who's also 25, and her name is Wendy. She has a twin brother called Oliver. Wendy and I met at work. We started properly dating after we got together during a work party. I knew she had a brother called Oliver, but I never met him until a few months into the relationship.
I went over to her house, and she and her twin still lived at their parents' house. With them being twins, they hung out a lot at home. So when I hung out with her at her place, he was always there. I started getting very close with Oliver, and I would often just hang out with him if Wendy wasn't available.
We often played games and chatted about random things in his room. It was a very private room as it was at the end of the hall and the room next to it was a storage room that was rarely used. He also had some soundproofing foam pads on the walls. He had an awesome gaming setup and a nice couch, as well as his bed and wardrobe, etc.
We often talked about women, past women, what we did with them, what we liked, and what we wanted to try. He would ask me what I did with women and then awkwardly add "With other women... obviously, I don't want to hear what you do with my sister." He also kept the identity of his girlfriend private. I found this weird because it sounded like a long-term relationship, but it didn't sound super serious at the same time.
One day, Wendy was having some drinks at her friend's house, but I hung out with Oliver in his room drinking and gaming. We started chatting, and as the night went on, the dirty talk got dirtier and more personal. He then started saying he did want to hear about what I and his sister did together. I was nervous at first and was reluctant to answer, but he slowly pulled it out of me. I started telling him the basics like she'd suck me off, then I'd eat her out and finger her. Then she likes cowgirl the most, but we try various positions. Then he wanted more and more detail, like how she'd suck me off, how she liked to be eaten out, etc.
Then, as I described how she liked me doing more circular motions with my tongue on her clit he said "Oh that's strange, when I'm eating her out..." He just stopped talking and pretended like he forgot what he was saying. I pushed him more and more, and I even gave him some ways out of it by saying, "Did you mean to say when you're eating your girlfriend out?" But he just kept shutting it down. We both got more and more annoyed, and we started shouting at each other.
Then Wendy walked in. She wondered what we were fighting about. I started getting a bit defensive and asked why she was home. She just said they got bored and called it an early night, then started questioning our argument again. When neither of us would talk, we all just went to bed.
After a while, Me and Wendy started making out, and soon it led to her sucking my dick. A while after, I started eating her out. As I tongued her clit for a few moments I couldn't help but think about Oliver's comment. I asked Wendy, "Do you like me licking you this way, or do you like it a different way?"
In her tired and drunken state, she said, "Well, Oliver does little figures of eight with his tongue." She immediately opened her eyes wide and covered her mouth with her hand.
Sam: WAIT, you guys actually do stuff? He didn't just fumble his words before. This is what we were arguing about when you came in.
Wendy: Oh fuck. Look, it is just something we started a few months before I met you. It's meaningless. It's just a fun thing we do from time to time.
I held my hands to my face and sat in silence for a few seconds to try and gather my thoughts and words.
Sam: OK, to be honest, I find it hot. WEIRD, but hot.
