Shelly is frustrated.

Blah blah blah, dirty boxers, blah blah blah, washing machine. You’d have gone to the doctor already if it didn’t mean money.

It’s Saturday though, so that means a day to laze around. Maybe you should take Vivian out on a date?

As you ponder on this over breakfast at the table, you notice that Shelly seems a bit… lost. She’s staring at her cup of coffee, stirring it with her spoon over and over.

“You okay there, sis?” You ask her, which wakes her up from her daze.

“I’m… fiiine.” She says, but it doesn’t really sound convincing. “I just… had a dream and I’m not sure if I should tell you about it.”

You groan. “You brought it up already, so you know you want to tell me. So come on, out with it.”

“Fine, you asked for it!” She says with a smirk. “I had a dream where you, Vivian and I had a threesome!” She says a little too eager.

You weren’t drinking or eating, yet you still managed to choke at those words. Shelly is obviously amused by it.

“W-why would you have a dream like that?” You ask.

“Gee, I don’t know! Maybe it’s because my little brother hasn’t touched me in a week when I’m already aching to have his cock inside me!” She vents.

“…subtle, sis. Subtle.” You state, eyes narrowed at her.

“Shut up! It was a great dream, but now I’m even hornier than before!” She groans. “Come on, bro! Just a little bit! I’m going crazy here!”

“Hey, you agreed to this!” You tell her.

“I know, but I didn’t think it’d be this hard! Besides, I can’t help but feel at least a little jealous that Vivian gets to enjoy your wonderful cock and I can’t!”

“Shelly…”

“Look, we won’t even have to touch each other! Just… jerk off in front of me while I do it in front of you! Okay?”

You want to tell her no on the grounds that it still feels like cheating on Vivian, but you also can tell just how frustrated she is.

“Fine. But just that, ok?”

“Yes!” Shelly fist pumps. “Thanks, bro!” She smiles at you.

You go to her room, unceremoniously get naked and sit on Shelly’s bed, right in front of each other.

You watch as your sister masturbates in front of you. Her fingers start by sliding up and down her pussy lips and teasing her own nipple in circular motions. In front of her, you’re stroking your cock for her. It feels embarrassing to be watched, so you think of it as watching porn and only focus on watching Shelly.

She takes her fingers inside her cunt and the fondling of her breasts becomes rougher. Her breathing becomes faster and faster along with her movements. Her free tit bounces, she rubs her clit with her thumb and moans loudly.

She notices your movements are getting faster too. You’re about to cum, and she knows it.

“Please, cum on me!” She asks desperately.

You do so. Ropes of cum fly and land on Shelly’s stomach, making her cum as well.

“Ah!! Aaaah!!” She moans as throws her head back, her back arcs and every muscle in her body tenses.

Shelly breaths hard, but has a satisfied smile.

She cleans herself and you both get dressed. She gives you a tender kiss on the lips afterwards.

“Thanks, brother!” She smiles.

“What did I say?”

“It’s just a little kiss from your sister. It’s not cheating!” She defends herself with a smirk. “Now, if you’ll excuse me, I’m going to take your girlfriend out on a date.”

What?

“What?” You voice your thoughts.

“We can’t just expect her to magically want to share you with me! I need to get closer to her! So I’m taking her shopping.”

“She didn’t tell me anything…”

“Of course she didn’t! I told her not to! You can’t come with us but look forward to the results!” She winks.

And so, both your sister and your girlfriend are out, leaving you alone on a Saturday. Well, that means you have time to catch up on some series and games, at least.