This was a response to a colorwithme prompt. The comm was deleted so I'm posting it here....
The prompt was:
Demi tells Selena she's gay. Selena tells her to prove it. (Bonus points if one of them gets pushed against a wall)
Also I am sooo shitty at writing kink
Demi was sitting on the bed with her best friend. They were playing the game 'Two Truths and a Lie', even though the game was typically really easy since they knew each other so well. It was Demi's turn. She thought for a moment, trying to figure out whether or not she should use the idea she had.
“I'm seventeen years old. I have a crush on Joe Jonas. I'm gay....” Demi said these three things with zero confidence in her voice. She meekly gazed at Selena, who stared at her in complete disbelief.
“So you're either gay or you have a crush on Joe.” Selena's eyes widened and she was left to ponder which of these two statements was the truth. Selena didn't know Joe quite as well as Demi did and she had heard rumors about the two of them, but somehow she couldn't believe Demi liked him that way. Demi being gay, though...There was no way. Demi must have cheated and told two lies. There was no way either was true. “I honestly have no idea.” She admitted.
“I'm gay.” Demi practically whispered, hugging her arms to her chest. The other girl looked at her, intensity evident in her eyes.
“Prove it.” When these two words left Selena's mouth, Demi sat silently avoiding her friend in the face. She stood, pacing the room a couple times before Selena got up from the bed. Selena seized Demi by the shoulders, slamming her roughly against the wall. “I said - PROVE.IT.” She had never seen her so aggressive before.
Demi fought back, taking hold of Selena and pushing her against the wall instead. “You're going to wish you hadn't said that.” She muttered, pinning Selena's arms before crushing their lips together. The first kiss was tender, but grew rough when Demi needfully licked and bit Selena's pink lips. She let out a low growl, allowing her tongue to slide along the other girl's jaw line. Surveying Selena's exposed neck, she teased the skin with her teeth, finally biting down hard after hearing the brunette's pained whimpering. Selena fought against the pressure Demi was putting on her body, pushing back until she knocked her to the floor. Selena remained atop her friend, wearing a smirk on her lips.
“I believe you. But now it's time for me to show you...” She grinned, pulling up Demi's shirt above her head. “...how much gayer I am than you are.”
“Sounds like a challenge.” Demi retorted.
“A challenge I am happy to take. Now shut up while I make you scream my name.” Selena demanded, moving quickly to unbutton and remove the other girl's jeans. She took in the beautiful sight of Demi in her bra and panties, something she had been guilty of thinking of more than once. Trailing her finger down Demi's stomach, she noticed her friend breathe in deeply. Teasingly, Selena's fingers met the black fabric barrier between her and Demi. It was already damp with desire as she rubbed her fingers against it, causing the brunette to let out a suppressed moan.
“Please...” Demi was pleading, twisting her body desperately against Selena's touch. “Don't tease me.”
“You want me to?” Selena's voice turned tender for a moment. She had been hesitant to move forward, after what they had always said about purity.
“Fuck purity. I want you inside me.” Demi gasped as Selena complied, moving her fingers under the fabric and into her soft center. “Mmm.” Demi bit her lip, trying to control the volume of her moans while Selena rubbed her clit. She pumped in and out and with every movement, Demi was closer to breaking point. Noting the frustration in Demi's noises, Selena pulled down the girl's panties and brought her tongue to where her fingers left off. Demi tasted sweet, and she licked her deep, causing her to scream out in pleasure.
As Selena brought her to orgasm, a triumphant expression crossed her face, pulling her friend close to her. Lips still wet with the other girl's juices, she spoke, “I win.”