Brenda swallowed my load

As my cock started twitching, Brenda lunged down at it and took it all into her mouth.

"Wait, what-??!"

But it was too late. Her lips and tongue were so soft and warm, and she sucked so good I felt in heaven. I also felt familiar, as if I had already had her lips around my cock. At the same time, screams of pleasure came from the bedroom. Probably the girls in the video had cum at the same time we did. Or was it Sarah and Katia screaming?

I climaxed, and I shot all my load inside her mouth. I mean, it was a couple of small shots, but she received them all as she moaned. She sucked me almost as if she were kissing passionately, completely lost on my cock. I looked down and I saw her gripping her thick cock hard as she also ejaculated. It was a magnificent sight: her dick twitched really hard, and I could notice it was difficult for her to keep it steady. She let out long, thick ropes of semen, which quickly coated her fat thigh and pooled between her legs. Her orgasm was so long, and she let out so much cum it was unreal.

"Oh, Liam... Oh, Liam..." She moaned after sitting straight again. "That was... So good... You're so tasty... I'm sorry, I think I stained your floor! I'll... I'll clean it!"

After the immense pleasure waned, immense guilt flooded my mind.

"Oh, no... This... This was wrong! This was a mistake!"

"No, Liam! Relax! It's... Alright!"

"It's not alright!" I quickly pulled my shorts up and stood, starting to pace around the living room. "You... You sucked me! I've cheated on my girlfriend! Ah, Sarah's gonna be so disappointed!"

"N-no, not at all! See, we just... You just came in my mouth. We were... Having fun! Sarah understands! We do that all the time! Ah... I mean..."

I stopped.

"What?"

Brenda bit her lip, and not in a sexy way, but in a «I shouldn't have said that» way. She stood up, her semen slowly flowing down her thick legs.

"Liam, listen... We... We are just that close... Sarah loves you. She loves you so much! But we just... Have fun like that." She seemed genuinely ashamed. "It's... A cousin thing."

I tilted my head. I wanted to believe it, as the twins had been so nice, and Sarah was so happy with them. But imagining my girlfriend giving incestuous futa handjobs was... So hot. No, so weird!

"Alright." I said after a long while. "Your «cousin thing» is starting to be a bit too much. At least you aren't fucking each other..."

Brenda bit her lip once again and raised her eyebrows like a sad puppy.

"Well..."

"Oh, no..."