A/N: Prompt from an anon; Sam/Rachel/Santana - when Sam walks in on his girlfriend, Rachel, having sex with Santana, he's completely enraged until Rachel explains that she wants both of them together. Thanks!
Rocking back and forth on Santana's tongue, gasping and moaning, fingers digging harshly into her breasts and sides as an anchor to hunch herself up and down, Rachel's barely able to keep her eyes open. She knows she should, especially as she's expecting her boyfriend to show up at some point, but it's like the lowest thing on her totem pole. Santana's tongue fucking her? It's too good and too pleasurable and too now to think of anything else.
Too now that translates into a shuddering, thrusting climax the second Sam walks into her bedroom. "Oh, Sam," she gasps, halfway in bliss and expectant mortification, her words drowned out with a low, humming cry of release as Santana's tongue fills her, "Saaaam-ntanaaaaa!"
Sam stares at her, his wide mouth open and brow lined. "Rachel?" he hisses, palm slamming against the side of the door, "What the fuck are you doing?" His shoulders sag, and as Rachel straightens, pausing, barely able to struggle up from Santana's tongue and mouth, he shifts away from her.
Expecting his response, Rachel still pushes her fingers out, counting it as a win when they glance upon his shoulder without him flinching away. "Sam," she whispers, "Please. Let me explain!"
"Explain what?"
Rachel swings her arms up, around his chest. Very aware of her naked state, she still molds her body to his. "I want you," she breathes, lifting on her toes to meet his ear, lips pressing and kissing along his jaw, "You both."
"Both?" Sam snaps back. He stares at her. His hands drifting up, they cup and curl around her naked hips, digging into her, and even, maybe, without his saying-so, his dick tells her he's excited as she feels it start to react against her stomach, clutched tightly to him as she is.
Santana, almost late to the party, sits up. "Us both," she purrs, fingers sliding up and down her chest and thighs, dipping down even further, "Or are you as deaf as your lips are giant?"
Swallowing, Adam's apple bobbing, Sam stares at first Rachel, then Santana. "You both?" he repeats. He's so bewildered and off kilter Rachel almost feels guilty.
Almost.
Rachel nods. "Us both," she whispers, then whispers again when Sam meets her gaze again, "I… I'm sorry, but…"
"But nothing." Standing up now, Santana stalks forward. Approaching Sam from the other side, arm settling around Rachel's waist as her other hand crawls up to tangle in the blond hair at Sam's nape, she smiles up at him. "You ever wanted a threesome, hmm?"
Sam continues to stare down at them.
"You ever wanted to boast," Santana begins again, pressing her naked body against him and Rachel, "That you've gotten… That you have two hot smokin' babes?"
Swallowing again, Sam skims from Santana to Rachel. "Rache?" he asks.
Nodding, Rachel smiles. "I love you," she promises, meaning it, "And I want to share this… Her with you?" She sucks her lower lip into her mouth. "Okay?"
Sam stops and starts, his mouth opening and closing, and Santana, pressing in closer, purrs again.
"Okay?" Sam glances at Santana, then back to Rachel, and back to Santana again. "Really?" he asks.
Meeting Santana's gaze, Rachel nods. "It's a start, at least," she murmurs, turning to smile up at him.
"A start." Sam's large hands cup around both her and Santana's hips. His dick makes itself known again. "Okay," he licks his lips, looking down at them, a smile barely starting to turn his lips up, "Not like I ever got a satisfactory taste of Santana in high school to turn this – and you two – down.
"Especially," he continues, leaning down to kiss Rachel deeply, passionately, staring heatedly at her, "When you've already decided without me."