He wanted to watch me (a trans girl) cum inside his girlfriend

I've been hooking up with this guy Felix on and off for a couple months now. Casual, nothing serious. Mostly just fun. He knows I'm trans obviously, and he's so into it. What we have is honestly great. It's easy. Good sex, low drama, and minimal time investment required. The only unusual thing about it is that Felix has a girlfriend, and he hasn't told her about me.

To be honest that actually isn't all that unusual. It is shockingly common for many straight guys with girlfriends or wives try to hook up with me. I deal with it all the time, and I must admit a part of me loves being their secret fantasy. I play into a lot too. Anyways.

Last week he texted me something different.

"My girlfriend wants to meet you."

I didn't know until now that his girlfriend knew about me. Which, fine, maybe I should've asked more questions. I assumed I was more of a secret thing. But he explained. I guess recently he and his gf Tessa have been talking about adding other people into their relationship, and sort of opening things up. Apparently they have been talking about me during sex, which honestly was hot to think about.

He ended up telling me that Tessa was "curious" he said.

"Curious about what?" I asked.

"About you. About your situation."

My "situation." Sure. I knew what that meant.

"She wants me to fuck her?"

"Yes. And so do I. I actually want to see you cum in her" he replied.

I stared at my phone for a solid minute before I responded.

"Like. Inside her?"

"Yeah. We have been talking about it. The idea of a girl like you cumming in her is the hottest thing ever honestly".

I'm not going to pretend I hadn't thought about it before. I have a cock. I cum. I know what that means. The idea of being inside a girl, bare, and finishing deep, I think about it a lot. I've done it a few times too but it has been a while since i've been with another girl.

"When?" I texted back.

Tonight. Their apartment. Tessa opened the door and she was stunning. Shorter than me, dark curly hair, this soft curvy yet petite body in a sundress. She smiled at me with a naughty little smile that I really enjoyed.

"Hi. You're even prettier than the pictures."

"You too."

Felix was on the couch. He waved. Casual. Like I was coming over for dinner, which technically I was. We ate Thai food and drank wine and Tessa kept finding reasons to touch me. By the second glass, her hand was on my thigh.

"Can I ask you something personal?" she said.

"You're about to let me fuck you. I think personal is fine."

She laughed. "How big are you?"

"Come find out."

That's how we ended up in their bedroom.

Felix sat in the chair by the window. He wanted to watch. Tessa and I stood next to the bed and she kissed me, soft at first, then harder. She tasted like the wine. Her hands went to my shirt and she pulled it off and looked at my small tits, my flat stomach, and then down.

"Can I?" she asked, fingers on my zipper.

"Yeah."

She undid my jeans and pulled them down and I was already hard, straining against my underwear. She cupped me through the fabric and her eyes went wide.

"Oh my god," she whispered.

She pulled my underwear down and my cock sprang free and she just stared.

"You're a girl with a dick," she said. Not mean. Amazed. Like it was the most exciting thing she'd ever seen.

"That's me."

She stroked me, slow. I was already leaking. "And do you think you could get me pregnant?"

"If you let me cum inside you, yeah."

"I want you to."

I pushed her back onto the bed. She pulled her sundress off and she wasn't wearing anything underneath, and she was already wet. I could see it. I could smell it. She spread her legs and I got between them and the head of my cock pressed against her and she gasped.

"Go slow," she said.

I pushed inside her. No condom. Bare. And the feeling of her around me, tight and wet and warm, I almost came right then. I had to stop and breathe.

"You okay?" Felix asked from the chair.

"She feels incredible," I said.

Tessa pulled me down and kissed me while I started to move. Slow at first. Feeling every inch of her. She was making these soft sounds against my mouth and her legs wrapped around my waist.

"Harder," she said.

I gave her harder. My hips snapping forward, pushing deep, and she was moaning now, loud, gripping my shoulders. I could feel her getting wetter around me with every thrust.

"I want you to cum in me," she said. "I want you to fill me up."

I looked at Felix. He was watching, hard, his hand on himself through his pants.

"Do it," he said. "She wants it. Fuck my girlfriend full of your girl cum"

I started fucking her faster. The headboard was hitting the wall and I could feel that pressure building at the base of my cock, that tight hot tensing feeling. Tessa was moaning and had her legs wrapped around me.

"I'm close," I said.

"Inside me. Please. Don't pull out." she begged me.

I pushed in as deep as I could go and came. Hard. I felt myself pulsing inside her, filling her, and she made this broken sound and tightened around me so hard I couldn't move. I just stayed there, buried, emptying into her while she shook and her boyfriend watched.

I stayed inside her for a long time after. Neither of us moved. Just cuddling. I could feel myself softening inside her, my cum warm between us.

"Thank you," she whispered. That was so hot.

Felix came over and kissed us both. Tessa was lying there with this happy look on her face, her legs still open, and I could see the mess I'd made starting to leak out of her.

That is when Felix surprised me. He had Tessa lay on her back and he made her spread her legs. He started rubbing his gfs clit using my cum as lube. Tessa started moaning softly again at his touch. A moment later Felix had his tongue on his girlfriend's pussy, and he was licking and tongue fucking my cum out of her. I hadn't expected something so dirty from him honestly.

Tessa was moaning and I started to get hard again just from watching. I started stroking myself and I just watched as Felix tongue fucked his girlfriend's cum filled pussy to orgasm. It didn't take long, just a few minutes.

"Oh my god. That was so hot!" Tessa said when Felix was finally done. She looked thrilled about her bf doing what he did.

Then I got dressed and got ready to leave. I sorta got the feeling that the two of them wanted some couple time. They thanked me as I left and each of them gave me a deep kiss as I walked out. I must admit I felt the love from them. It felt like they really appreciated and enjoyed me. I hope we take things ever further.

Tessa texted me the next morning. "When can we do that again?". Not gonna lie I was pretty happy to hear that she still felt happy about it. I have had people regret hooking up with me before, but the fact that the next day she still felt good about it was a great sign to me.

I'm going back this weekend. Can't wait!