That Boy is a Monster, chapter 2:
Keep it in the closet
"WHOA," Bellatrix said before allowing her mouth to gape in the shock that washed over her like...well like waves of shock. Her gaze remained where her mind wished it to depart from the sight on the floor of the coat closet of her mother's home. It was Technically still her home as well, but before long she'd be married to Rod and she was already beginning to think of the Lestrange manor as hers.
Right now, though, her current problem was the coat closet. Mother had set her to hanging up the coats of a few guests because their dim elf was busy in the kitchen and somehow couldn't manage to do two things at once. This was Bella and Rod's engagement announcement dinner, so they had a full house, both families being present. So Bella stood with three heavy coats in her arms gaping down at...at... Kreacher and Regulus sat together on the floor, faces full of trepidation...where precisely three seconds ago their faces had been on one another, thus Bellatrix's loudly exclaimed *WHOA*! She considered saying it again but they'd stopped. If only her mind would do the same.
"What the hell," she hissed in disgust. "Why? The two of you are the most disgusting...sickening...Gods, Regulus! And you Kreacher!"
Just where to start and what to say! This was literally turning her brain inside out. .say!?
"Kreacher," the elf floundered. "Kreacher..."
Bellatrix's gaze returned demandingly to Regulus. This took disgusting horny teenager to an entirely new and unnecessary level.
"Bella, it...Look it's our business," he said, though his expression was flustered and pleasantly afraid.
"Really? So much your business that you're at it in my coat closet? (Suddenly it was her house again.)
"We didn't think anyone would find us here," Kreacher said.
"Mother...she's always everywhere. Even after I put that explicit sign on my door," Regulus complained, scowling in frustration.
"The stupid one where no one is allowed to enter without your expressed permission," Bellatrix drawled. Her cousin nodded.
"Look Bella. I...We're sorry. Just please don't say anything."
"Regulus, that's sick,"Bellatrix exploded, needing the disgust to go somewhere and finding an outlet in exclaiming about it.
"We once saw a seer while out at a street fair. She said we had...something around us or our auras or some rubbish, but she said we were a couple, Obviously a couple. It seemed a weird thing to say so it stuck with us," Regulus explained. "We are best friends, no one is closer to me than Kreacher. I didn't think we wanted to shag, but after that I got curious and asked if he wanted to...see what it was like. I mean not fully shagging, we're the wrong size but there are other things..."
"I'm going to be sick," Bellatrix said flatly, meaning it. "Right on your bloody heads!"
"The point is, we love one another and this makes us happy, Bella. It's not hurting anyone."
"It'll be hurting you if anyone else finds out," Bellatrix said darkly, realizing that this could be an opportunity. Eyes narrowing she asked,"What'll you give me not to tell?"