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The night before her wedding, Narcissa was nearly in tears. Not tears of happiness or any sort of regular nerves or excitement that one would expect to be feeling before their big day. No, she was crying tears of pain and sadness for the complications this marriage would bring her. She was in love. But she wasn't in love with the man that would become her husband. Oh no, she was in love with none other than her very own sister. Her very much married sister–not that her sister's marriage had stopped their closer than socially accepted relationship. Well, only strictly speaking of course, it could be argued that pureblood families like theirs had been participating in similar trysts for centuries.
She was sitting at the edge of her bed in her room in Black Manor, trying desperately to control her emotions, when the very object of her thoughts walked through her door. Something she didn’t notice until she heard her sister's voice.
“Cissy, what's wrong?” Bella asked, sitting down behind her, resting a hand on her shoulder.
“What’s wrong, Bella?”--Narcissa chuckled humorlessly– “What’s wrong? Bella, I'm getting married tomorrow! I don't want to marry Lucius, I want to marry you!” She collapsed back to her bed flinging her hands up to hide her face.
There was a sweet little smile on Bellatrix’s face before she answered. “Cissy, in case you haven’t noticed yet, I’m married too. And if I’m not mistaken, we have still been sleeping together.”
Bella’s flippant response made Narcissa pause for a moment. Yes, she supposed. Bella’s marriage never stopped them from seeing each other, but she wasn’t really thinking clearly at the present moment.
“How are we going to get around Lucius as well as Rodolphus without being caught?” she managed to ask in a moment of calm.
“Oh Cissy.” Bella stroked down Narcissa’s hair and back. “We’ve managed to get around Rod with no problems. I’m sure we can manage Lucius too. We’ll just have to meet whenever he’s at work or sleeping. The man, if he can honestly even be called that, really is oblivious. He won't notice if you come and see me sometimes.” Bella’s wandering hands allowed her head and heart to finally calm down somewhat, bringing her just a little closer to earth.
She felt the mattress let up before she saw Bella stand up to face her and her hands ever so slowly found their way around to toy with Narcissa’s breasts. “We’ve always been close, Cissy. No one will bat an eye, my love.”
They stayed like that for a moment, just watching each other until a moan was ripped from Narcissa’s throat as Bellatrix suddenly pinched her nipple. “Please Bella, I need you so badly right now.”
“Darling Cissy.” Bella chuckled deeply, letting her hands wander further down her body, closer and closer to where she so desperately needed them. “You know I love it when you beg for me.”
Bella finally made it all the way to her pants, toying with the waistband briefly before eventually moving on, finding her centre.
“Merlin. Please, Mummy,” Narcissa panted as Bella lazily circled her clit. “I need it– please, please, please.”
A heat burned low in her belly as Bella sped up the touches on her clit. She nearly combusted as Bella plunged two fingers into her cunt. The feeling of her sister’s fingers inside her at that moment made her mind go blank. All of a sudden, she couldn’t remember what she was upset about or why her cheeks were sticky with dried tears. All that mattered was Bellatrix – her Mummy – and how she knew every part of her. Every little spot inside her that made her yelp, moan or scream.
“Mummy! oh Merlin, fuck, please Mummy don’t stop,” she panted, jerking her hips to push Bella’s fingers further into herself.
“Oh no, I will never stop doing this to you,” Bellatrix vowed. “Watching you fuck yourself on my fingers, chasing your pleasure, knowing I could take it away at any time. Knowing I make you like this, knowing I own you... Merlin, I wouldn’t dream of giving this up, not for anything.”
The combination of the sensations, the words, and the sight of her sister leaning over her was enough to send Narcissa over the edge and into the abyss that was her pleasure. Orgasm ripping through her, she looked up into Bella’s eyes just in time for her to crash her lips over her own in a searing kiss. Teeth and tongues clashed as she rode out the last waves of pleasure. She barely registered Bella lying down next to her and wrapping her arms around her in a comforting and protective gesture.
“Thank you Bella,” she said after a few minutes of rest. “I really needed that.”
“I could tell Babygirl,” Bella responded, only slightly smugly. “Now, how about we talk through the rest of your worries Cissy?”
She sat back up so she could look Bella in her face once again. “Not right now, please, I want to taste you. I don’t want to think about it again just yet.” She implored as she crawled over her sister, leaning down to kiss her again.
She hummed as Bella responded eagerly, plunging her tongue into her mouth, tasting her. Eventually she trailed kisses down her sister’s jaw and neck, teeth nipping every now and then. When she finally made her way in between her sister’s legs she dove straight in, not even feeling the need to tease Bella like she normally would. She licked and licked until she felt a hand in her hair, nails scraping at her scalp. Knowing that her sister was close she put her lips over Bella’s clit and sucked, hard. She heard as Bella reached her peak, screaming out her orgasm, pulling on her head to keep her exactly where she was.
Bella pulled her up for another kiss. A kiss she poured all her emotions into. A kiss that promised her love, her commitment, her trust. A kiss that tasted of forever.
“So, are you ready to talk to me yet, Cissy?”