In one aspect Mary was delighted to have her daughter back from university for the summer holidays but in another way she was disappointed as she wouldn't be getting any sex from her son Rob.
In fact as she wasn't getting any sex, apart from the once a month from husband John.
Even the fun she had been having with Sophie her badminton friend had been put on hold during the summer holidays.
Mary had gone out shopping and decided to have lunch out and told Rob and Michelle she would be out most of the day and would have to sort lunch out for themselves.
After she had lunch Mary realised she forgotten to pick up some dry cleaning and popped back home pick up the ticket. She went indoors and heard noises upstairs and as she quietly went up it was obviously sexual noises.
They were coming from Rob's bedroom and Mary was keen to see who he had in there. The door was partly open and as she peered in she couldn't believe what she saw. Her daughter was lying with her legs wide apart and her son was in between her legs licking her cunt.
Mary knew she should go in and stop them but she was mesmerised as she watched her daughter climax loudly.
Mary also realised that she was getting turned on. She knew how good that felt as her son had often done it to her. Although she was annoyed at what she had just seen she was also very jealous.
She was totally mesmerised with what she was seeing and was glued to the spot and unable to move. Neither her son or daughter had seen her standing there. It was now Rob's turn to cum. He lay on his back, his erect cock standing up. His sister knelt over him and took his cock in her mouth.
Mary looked on in amazement, her hand up and under her skirt and feeling her wetness. Rob looked up and saw his mum standing there watching them. He beckoned her to come in.
She stood next to him and he lifted her skirt and felt her through her panties. Michelle glanced up and saw her but nothing and no one was going to stop her sucking her brother's cock.
Mary loved it as her son slipped a finger inside her panties and then into her wet slit. She watched as her daughter squeezed her brother's balls and rubbed his cock as she sucked him.
Rob was soon cumming and as his sister clamped her lips tight round his cock head he pumped lots of hot spunk into her mouth. As Michelle sat up she opened her mouth to show her brother and Mary grabbed hold of her daughter and had a very messy cum kiss.
Only Mary had to cum now and she took her panties of and lay on the bed with her legs apart. She needed to be sucked and licked and didn't mind if it was her son or daughter who did it to her. She closed her eyes and let them get on with it.
She could tell it was her daughter. Mary's orgasm was extremely quick. They sat and recovered and Mary said, 'what we've just done, we all know is very wrong and no-one must ever find out, especially dad. However, I don't know about you but I need this.'
Michelle said, 'I need it too. I can't go for six weeks without sex.'
Rob said, 'count me in.'
Mary asked Michelle, 'I never realised you were bisexual.'
'Neither did I until my roommate Emily caught me masturbating and offered to do it for me. I loved it and did it to her and when she showed me oral, well that was it. However I still love my boyfriend giving me a good fucking,' Michelle replied.
'We must be careful. Each morning I have breakfast with dad just wearing my dressing gown. When he leaves I go up and shower and if either of you want to join me in my bedroom I'd love that,' Mary said.
The next day all three of them were excited when they woke up. Or should I say feeling very horny!
Rob had already experienced his mum first thing in the morning and unknown to his mum his sister had been a regular to his bedroom before she went off to university.
As Mary sat chatting to her husband over breakfast she could feel her nipples getting erect and her mound getting very moist. She had no panties on under her dressing gown and even thought she could smell her juices.
Meanwhile upstairs Rob was slowly stroking his rock hard cock making sure he didn't stimulate himself too much and Michelle was playing with her nipples.
Mary waited to hear John's car start up and went upstairs. As she walked into her bedroom and took her dressing gown off Rob and Michelle joined her. They hugged and groped each other. Mary reached down for Rob's hard cock and Rob slipped a finger inside his sisters wet cunt.
All three of them were extremely horny. Mary lay on her bed, opened her legs wide and said, 'who's going to satisfy this?'
Rob didn't hesitate and slid his hard cock deep inside his mum's cunt. His sister said, 'don't forget me.'
He replied, 'I'll satisfy mum and then you and you can have my spunk.'
Mary's climax was slowly building as her daughter helped things along by sucking and playing with her nipples. She really wanted her son's cum but knew her daughter needed to cum too.
As Mary watched her daughter being fucked she knew she had to cum again. There was a look of absolute pleasure on Michelle's face as her brother fucked her. Mary was kneeling beside her daughter and sucking a nipple and fingering herself at the same time.
Mary said, 'sorry, but I really need to cum again.'
'Don't worry mum, we'll take care of that for you,' Michelle said.
She then slipped a finger deep inside her mum's cunt and said, 'Rob's told me about your needs. Just ask anytime and while we're here we'll take care of your needs.'
Mary carried on sucking her daughter's tits as she was being finger fucked. Michelle was loving being fucked by her brother and it wasn't long before they both climaxed. Michelle loved the feel as his cum spurted deep inside her. Michelle sat and said, 'mum open you mouth and I'll drip Rob's cum into your mouth.'
Mary loved the thought of that and Michelle straddled her mum's mouth and let her brother's spunk run out of her cunt and into her mums mouth. At the same time Rob was taking care of his mum's needs and using his tongue on her wet slit and hardened clit.