The evening was weird, everybody was polite, but the conversation never seemed to get going at dinner, Sky did not feel like talking to either of them so was more than happy with that, but the chat between Rob and Lily was not normal either.
Sky was not getting involved, the last thing she needed was a reason for more punishment, and so she kept her head down, but offered to clear everything up after dinner, that kept her out of the way, and should create brownie points to go against punishment too.
She had all but finished cleaning up, just about to wipe down the worktops, when she was called from the living room, she had heard hushed tones coming from there but this was an instruction.
'Sky come attend to your Mistress,' Lily shouted.
Sky felt sick, 'oh god what is going to have me do now', she thought, Sky put down the cloth and walked into the living room.
'Yes Mistress, how can I serve you,' Sky said as meekly as she was able, but she thought it sounded more resigned.
'Sound happier girl,' her sister said, 'All I want to know is, what did Rob do to you this afternoon.'
Sky blushed, she was not good at talking about anything sexual, but she took a deep breath.
'He gave me lashes,' she looked at Rob who looked pissed off, 'very hard ones, master,' she continued, 'then he used a strap-on dildo on my arse, which was painful, master. That was all he did mistress,' she concluded
'Thank you, Sky,' said Lily, 'and did he say why he used the strap-on?'
'He said I lost him a bet, and that it was being used on him tonight, and so I was getting it first, mistress,' Sky said wishing not to be part of this conversation. After a moment she add, 'Oh and Mistress, he said to prepare for more punishment tonight.'
'Did he...' Lily mused, but continued before Sky could say anything else, 'Well that was presumptuous of him, and he probably presumed I would not find out about the strap-on. He was not supposed to use that on you, and that means a special treat for you tonight, you get to be part of his punishment.'
'Thank you Mistress,' Sky said, not feeling happy about that at all, 'May I do back to finish the kitchen now?'
'Yes, off you go.'
Sky went back and finished the kitchen quickly, then disappeared to her room.
She must have fallen asleep, because the next thing she knew there were sounds like the cane from earlier, and she heard what she thought was Rob grunting. After a moment she listened to Lily's voice.
The sound carried through, 'You are such a worm and I clearly have not done this enough, how dare you deviate from the punishment I tell you to give her, and what is the crying out? That is 5 you have 25 to take, and you only have yourself to blame.'
Then she heard Rob again, 'Yes Mistress, I am sorry Mistress, I deserve these 25 for violating Sky.'
Sky listened to the sound of the cane swishing through the air and the whack as it hit Rob's arse, followed by his half suppressed grunt, which was so hot, she slipped her hand down her trousers and rubbed.
Lily was clearly taking her time, these were not close together, there was a pause between each one, Sky imagined the image, Rob standing the way he made her stand, taking the cane, although she was sure they were in their bedroom, so his hands would have to be on the bed.
Sky revelled in that sound, she imagined being the one striking Rob, she had never been into that, but he had pushed her to the point where the thought of doing it to him turned her on, sweet revenge. She rubbed her clit with a ferocity that reflected what she was hearing her mind away imagining the scene next door. Sky was surprised how quickly she felt the feeling rise the warmth in her pussy spreading to her clit, she quickly got to the point of no return, and shuddered as she climaxed. She must have made noise, because the next thing she heard was Lily calling her.
'Sky, remove your clothes and come in here,' there was no misreading that was a command.
Sky quickly removed her clothes and half ran into Lily's room, as she entered she said, 'Yes Mistre...'
She trailed off, what greeted her was not what she expected, although she was not sure what she expected, Rob was secured to the bench naked, almost identical to how he had secured her on Friday. His arse was glowing red with cane welts, she thought one of them might have drawn blood. She composed herself before she spoke again.
'Yes Mistress, how can I serve you?' she said as confidently as she could muster.
'The worm is receiving these because he violated you, I thought you might like to see the last 5, stand there, you will like what comes after,' Lily said.
Sky looked again at Rob, she saw that in addition to how she was secured he had a ball gag on, she must have applied that because of the 'crying out' that she had not heard. She watched as the cane swished through the air, connecting hard with Rob's arse, the whack this close made her wince, she the grunt came from rob, it was clearly suppressed by the gag.
Lily then took the cane and slapped it against his balls, she did this 4 or five times, and had clearly done it before as they were very red, almost without any warning the cane shot back and slapped into his arse again, with the accompanying grunt. Sky was not sure she liked being this close as another slap landed hard, and she was sure she could not take the punishment Rob was. Lily slapped has balls about a bit again, then two final swishes of the cane. Sky let out a breath that she did not know she had been holding, and Rob seemed to relax too, not that there was any movement from where he was tied.
'Now,' said Lily, 'Sky this is the fun bit. While Rob pays for his bet, you and he will be in competition, the winner gets not to be punished.' She laughed.
'Yes Mistress, what do you need me to do?' Sky asked.
'This is simple, while I am collecting the debt, you have to give Rob a blow job, if he can resist cumming for the full period I collect, then he wins, if you can make him cum, you win.' The smirk on Lily's face said she was loving this.
Lily indicated to under the bench, Sky crawled under and positioned herself under Rob's cock, it was hard as ever, and millimetres from her face, there was a tiny amount of pre-cum on the end that she extended her tongue and licked off, there was no way she was losing this.
Sky watched as Lily put on the strap-on, carefully moving the clitoral simulator to the right place to ensure every thrust rubbed her clit. Next Lily dripped lube onto Rob's arsehole, and massaged it in the same way that Rob had to her, Sky had the perfect view.
