Brenda

Brenda's curvy figure was unmistakable. She was wearing some tiny shorts and a top that looked like drapes thanks to her massive tits. She was holding a tablet whose light illuminated her belly.

"Huh?" I mumbled, barely conscious.

"It's... It's ok." She approached, and I sat up as she sat down next to me. "Sarah said it was ok."

"I... I'm still unsure. I don't know if I'd feel uncomfortable doing that with someone else..."

She leaned towards me.

"No, no, no, it's fine, Liam. It's just... Something fun. Like, right now, Sarah's having fun with Katia. Why can't you do the same?"

The phrasing of that sounded weird, but I could hear sex sounds coming from the room: those two were definitely watching porn. Brenda's face barely lit by her gadget's screen looked both ominous and adorable. She felt... Needy.

"We... We can try it out."

"Yes!!" She squealed in a whisper. She held my arm, softly pulling me closer to her. I could very easily feel her huge knockers against me, which made me feel guilty. However, that sensation slowly faded as I remembered I had Sarah's «permission».

Once she was cuddling tightly against me, she showed me the video. There were two girls who, according to the plot, were stepsisters. One was short and blonde, the other one was a brunette, a very tall one. The brunette had the blonde pinned against a sofa. The blonde struggled, but couldn't escape her stepsister's grasp.

"She tries to say «No», but she knows she desires her sister..." Brenda explains with a seductive whisper. "Hot, isn't it?"

"Yes. It's... They're hot, yes."

"Oh, their boobs are pressing against the other!" She sighed as she pressed her own tits against me. I was so aroused, but also confused as to why Sarah would want that. "You can... Touch yourself."

"What??"

"What good is porn if you can't... Masturbate?" She whispered as she slid her hand into her shorts and started pressing her thick, juicy thighs together. "Please."

I was unsure, but after seeing her start and imagining Sarah and Katia doing it as well, I did so myself. I pulled down my shorts and boxers and took out my 5-inch cock, which was half-hard at the moment. Brenda instantly loved it, and she ground her thighs together even more.

"How... Lovely." She sighed I could hear the desire in her voice.

I grabbed my cock and tried to focus more on the lesbians on the screen than on Brenda's lustful eyes. The girls started undressing, and soon the blonde pulled the brunette's jeans down and revealed a big, bouncy cock.

"What? She's trans?"

"No, she's intersex. You see, some women are born with both a cock and a pussy. We're also called futanari."

"Oh, I see. Wait... We?"

"Please, Liam, don't freak out, ok?" Brenda was holding my arm with hers, then she used her right hand to pull down her own shorts and reveal a big cock herself.

"WAIT, WHAT?"

"Shh! Don't be so loud!" She whispered. "It's alright. Katia is as well, and Sarah knows about us. Please, Liam. I know you're kind and smart and the best boyfriend in the world. I know you'll understand we're no different from any other woman! It's just... A cock."

Brenda spoke so sweetly, almost begging me not to overreact. I looked at her dick. Not only was it a longer than mine, but also really thick. I didn't know how she could hide it all this time under her clothes. I looked up at her. I was even more confused. Sarah already knew? So right now, Katia was fapping next to my girlfriend? And Sarah liked that? And she wanted Brenda and I to... Fap together? I didn't know what was going on fully.

"Your cock is still very hard." Brenda commented. "That means... You like what you see."

"What? I'm just... I'm not..."

"No, it's not gay. I'm still a girl. You've called me cute, haven't you?" She blushed and giggled so adorably it almost made me forget she was holding a thick, rock hard dick. "Being a futa doesn't change that. Just... Relax. Yes, let's relax and... Watch the video, alright?"

I decided to trust Sarah. And to trust Brenda. And to trust the growing arousal I was feeling, ignoring the guilt in my heart.

"Yeah."

In the video, the blonde was sucking the brunette's cock so intensely. She licked its lenght, she sucked its head, she deepthroated it. The gulping noises they made were almost as loud as the moaning from the video Sarah was watching in the other room.

"Isn't that lovely?" Brenda said with another sweet whisper.

"Honestly... it's really hot."

"Oh, I know..."

I glanced at her. She was looking at me with so much lust in her eyes, and her gaze went from my face to my cock. She even bit her lower lip. I looked at her cock, even bigger and harder now, with thick drops of presemen already glistening on its tip. Jeez! Her precum was so much! It looked even more abundant than one of my full loads! I also noticed she jerked off harder when her eyes were locked on my own cock.

I could not believe how horny I got. The blonde on the video had bent over, and the brunette was fucking her already. It was truly amazing to see a girl penetrating another. I didn't know I could be so much into it. I had to stop stroking at times because I was so close, while Brenda kept on jerking off hard. She seemed to have much more stamina than me.

I didn't know what was hotter: the video we were watching, Brenda fapping, or the knowledge that my girlfriend was masturbating with her futanari cousin in the other room.

"Oh, Liam, I'm about to." Brenda said after a while, almost sweetly. She was stroking her cock really hard, whole pressing her thick thighs together and imprisoning my arm against her huge tits. Her dick was already coated in her precum, and it'd started to twitch.

"Me too, Brenda." It was almost painful how much I was resisting cumming.

"Oh, how lovely! Let's cum together, please!"

I nodded. I stopped watching the video and focused on Brenda. Her chubby body jiggling to her frantic strokes was beautiful. I couldn't hold it any longer.

"Brenda... I'm..."