Somewhere, in the dimly lit, reasoned part of her mind, she knows this is going to hurt Kurt.
It's going to hurt like a bitch.
But that part of her brain is currently soaked in alcohol, and for once Rachel isn't paying attention to what's right and wrong and reasonable and just thinking about how delicious Blaine looks with his hair all tousled and his cheeks pink and his eyes bright and fuck everything, she wants to kiss him. It's not like she dragged him into a corner and pulled his pants down (although that certainly has merits, now that she thinks about it). It's Spin the Bottle, for God's sake. No harm, no foul.
She also knows that part of the reason she wants to do this is to show Finn how over him she really is, how wrong he is to think that she wants him back. Which she does. A little. But not right now. Right now she has promised Blaine that she is going to rock his world, and she fully intends to keep that promise.
Blaine doesn't look nervous or grossed out or dismayed to be kissing her; in fact, he looks almost pleased as they lean closer, their faces just a few inches apart. His breath has the smell of cherry vodka, and something else too. Something warm and inviting and really, really hot. Impatient by nature, Rachel decides to stop wondering about the trivial things like Blaine's breath and focuses instead on his lips.
She was right. His lips are delicious.
For starters, they're soft but firm, and they mould into hers easily, finding the contours of her mouth with an easy grace. He doesn't have any sharp whiskers that scratch her face, and she can feel his hand on the back of her head, pressing her in closer so that they don't have to move back anytime soon. When she parts her lips a little, she can feel his own curl up in a smile before his tongue is inside her mouth and gently running across her plump bottom lip, tasting her like no one ever has before.
Her left hand is beside Blaine's knee to steady her while the right is on his chest, right over his heart. She can feel the steady thump thump thump speed up, just a little, and it makes her move her left hand from beside his knee to the spot just above it. Blaine moans low into her mouth and she knows, if she were to look, that there might be a little bulge in his jeans, but that's crazy because Blaine is gay and totally off-limits. She keeps telling herself that, even when Blaine's hand grazes her breast and she nearly jumps him right there.
"Okay, I think we've seen enough!"
Kurt pulls them apart, fussing over Blaine and acting like that kiss was nothing more then the usual juvenile antics of a drunken teenage party, but Rachel knows better, and it's why she manages to smile for the rest of the night.