<em>"Just what is this?"</em><br/><br/>It was just about as bad as it could get. Katherine had a fearsome temper when she got angry. She wasn't violent, never ever that, but she was large enough to be physically intimidating to many (most?) people and she wasn't used to being stood up to.<br/><br/>The girls had been sat down at a young age by her mother and it had been explained to them how they were different to other girls but that different wasn't less.<em> "You'll have bigger sexual urges that other girls your age and you'll.... 'want' to do something about it. When you do, come to me and we'll talk about it. Never do anything about it without speaking to me first. I promise I will never, ever, be angry with you for coming to speak to me about this. Do you understand?"</em><br/><br/>That had been several years ago now. They explained that they had understood and that they would come to talk to her about 'it' - though at the time they only had a very vague idea about what the 'it' was. Since that time they'd worked out quite a lot more of the details of 'it' but neither of them had actually thought of doing  'it' with either male or female and so had never come to see their mother about it. Wanking almost certainly didn't apply, and by definition sucking off your sister wasn't something you could go and get cleared by your mother before you went and did it. Not that either of them had even thought about doing so before laying down on the bed and sliding their tongues around each other's cocks.<br/><br/>Now they were well and truly..... well, fucked.<br/><br/>Emily just looked at her mother and at the diminutive blob of Scarlet's cum on the end of her mother's finger. She was shaking with fear. Blurting out 'That's Scarlet's not mine!' probably wasn't going to help much either and so she kept her mouth closed. This was one of those times where keeping quiet and taking her punishment was better than putting up a fight. She turned to Scarlet. For once, she seemed to be thinking the same thing. Maybe there was something in cum that made you more responsible?<br/><br/><em>"Both of you, my bedroom, right now." </em><br/><br/>Emily blinked. She looked at Scarlet who had also blinked but who then shrugged. What was that about? They had long ago worked out that Katherine had finally realized that sending either daughter 'to their room' where there was Internet, laptops, video games, board games, where you smartphone still worked, and where there was every conceivable mod-con for a teenage girl within arms reach, was no longer a serious punishment for either of her daughters. She'd started sending them to mow the lawn, go and buy milk at the store down the road without shoes and socks on etc., but sending them to her bedroom was a new one. Well, Emily supposed that there was no Internet in there. Old people never used it.<br/><br/>She had no more time to think about things before she was frog-marched to the stairs and, with her sister next to her, was given the order 'up!' by Katherine. In that kind of mood both daughters knew better than to talk back to her. Whatever their mother had in mind for them was going to happen.<br/><br/>They walked into the bedroom like two condemned women. Very downbeat, very browbeaten. In contrast to their rooms (several Damascus suburbs were tidier than either girl's bedroom) Katherine's bedroom was immaculate with cream sheets, sumptuous pillows (and various throw pillows), very expensive and very nicely matching bedroom furniture, and absolutely nothing which could be hacked or cobbled together to get onto the Internet. Maybe Katherine was going to bore them to tears?<br/><br/>There was a solid thump. Emily shot around to see Katherine had shut the door. There was no escape.<br/><br/>Her mother looked really angry. Really, really, angry. She also had a boner the like of which neither girl had ever conceived was even possible on a futanari.<br/><br/>"Mum.......?" Emily squeaked. Maybe<strong>now</strong>was the time to point out that it was Scarlet's cum?