Melanie had moved into the house the day after Tim's 18th Birthday - six months before. Until then she had been living with her boyfriend, but the relationship had come to an end and she did the natural thing: she moved back home with her Father and stepmother. As well as Tim her stepbrother. For Tim at first it had been difficult, sharing a bathroom, having his peace and quiet disrupted, but after a couple of months things had settled down and he had grown to love his stepsister. Perhaps lust would be a better word - she was hot - 22, shapely, sexy. And of course things got more difficult to more comfortable things became - she would walk around the house in her pyjamas, and occasionally underwear. She would leave the underwear lying around, and it was always sexy. Of course she was well beyond Tim, but that didn't stop him dreaming about her, and sometimes jerking off thinking about her.
People would describe Melanie as "out there" and she would sometimes blow up, and express her views freely, but there was never any malice, and as soon as she had blown up she was your best friend again. So it was Friday evening...
"The little pervert is doing it again!" Melanie's voice screamed out through the house, as she stormed down the stairs and burst into the sitting room, pointing her finger at Tim, sat watching the television. "I bet he's wearing them now!"
Tim liked Melanie, but this one of her "explosions" as he called them, but one aimed at him.
"What's the problem?" It was Jean, Tim's mother, Melanie's step-mother who tried to sooth and calm Melanie down.
"I wanted to wear them this evening and can't find them. I bet he's got them on. I found my lacy blue set in his bed on Monday when he was out. Had to wash them. He'd stained them. Kept that quiet. But this is at least the second time..."
"Please Melanie, stop shouting - please just tell us what you're talking about." At that moment Keith, Melanie's Father, Jean's partner, Tim's step-father entered from the garage, drawn in by all the noise.
Melanie sighed. Tim looked at the floor and squirmed. It was the moment he had dreaded, but couldn't stop himself - he was found out, his little "kink" was about to be revealed...
Melanie was in full swing. "You know that pale blue set of bra and panties I have. I couldn't find them on Monday. Wanted to wear them, so searched everywhere. I went into his room to ask if he'd seen them. And they were on his bed, and the panties were stained. Dunno where he had gone. So I just put them in the wash..." Tim went red - he had "used" them, but was really worried when he couldn't find them, but thought as the week went on that whatever had happened was disappearing into the past. Now, it was tea-time Friday, and everything was unravelling. Melanie was still in full flight. "...and then I went to find those white lacy ones I've got, and found the bra but the panties are missing. I bet he's got them."
There was a pause as they all looked at Tim. It was his mother who spoke first. Softly. "Tim, are you wearing Melanie's panties?"
Tim couldn't speak, he was so embarrassed. Anyway, he had passed his eighteenth birthday months before - it's not the sort of question you ask your grown-up son! He should tell them to mind their own business... "There's an easy way to find out." Keith spoke in his deep masculine voice. "Tim, take off your trousers."
Tim was mortified, wanting to run. Jean was ready to step in but Keith raised his hand. "Stand up, Tim, remove them."
Tim slowly rose to his feet, all the others watching. He kept his eyes closed. He felt he had no choice. He undid his trousers and dropped them to the floor. His embarrassment was excruciating. He was wearing the panties. He knew they were lacy and that his cock would show, at least in outline, in them. More than that he was also wearing a pair of Melanie's white stockings and suspender belt.
For what seemed like eternity they all stood around in silence looking at Tim with his eyes closed, his trousers around his ankles, wearing his step-sister's underwear. It was Melanie herself who broke the silence. She giggled! Tim's embarrassment, the ludicrousness of what he was wearing, and his trousers around his ankles. Truth was she did love her younger step-brother - he was really sweet, and somehow the moment was making him even cuter.
It was Keith who made the decision - and when he did make a decision no-one disagreed. It wasn't that he was unpleasant or difficult. The opposite. He was a strong man who made decisions and kept to them. "I think we need a suitable punishment. I know Melanie is going out this evening, but the rest of us are at home. You will take your trousers right off, as well as those socks and shoes. You'll spend the evening wearing those panties and the rest. Think that is enough of a punishment. Anyway, I'm hungry..."
The Friday evening meal was strange. Not the food - they all enjoyed the chilli. Melanie was trying not to giggle. Jean was trying to be as normal as possible. Tim desperately trying to think of a way to escape the embarrassment of eating wearing his step-sister's underwear. The only one who seemed not to be phased was Keith, talking about what they were all going to do for the weekend.
Finally the chilli was finished, as was the ice cream. Melanie declared she would have to get ready for her evening out with friends, sarcastically adding that she would have to find some different underwear to put on, disappearing to her room. Tim also waited for Keith to disappear to the garage and for his mother Jean to go to the kitchen to wash up, before running to his room.
Tim slammed the door and lay on his bed. Part of him was mortified, embarrassed, in tears at what had happened, so humiliated. And yet... and yet Melanie, and his mother, and his step-father had seen his cock...or at least a big hint of it in the panties. And in the embarrassment it had gone a bit hard. He desperately wanted to jerk off, but thought he would wait until later. At the moment he just wanted to cry - it had been going well, but suddenly everything had gone wrong... horribly wrong.
Tim was now eighteen, and looking forward to going to college in the autumn. It had been a difficult journey to get to this stage. Until he was fourteen his father Michael had still been with Jean and Tim. It was difficult when his real father was home - they didn't get on, particularly over the last three or four years before he left. Tim was a disappointment to him. Michael was a really masculine type, with muscles, tattoos and shaven head. He worked on building sites. He had played football when younger. He drank Jack Daniels in great volumes straight from the bottle. He had wanted a son to be the same, and Tim wasn't. Tim maybe got most of his genes from his mother - he was slim, average sort of height for his age, and still was. He had blonde curly hair. No-one would call this smooth skinned, freckly kid masculine! Jean - Tim's mother - was also slim, with curly blonde hair. She had been attracted to the masculine man, who had been attracted to the feminine girl - he was 23, she was 19 when they got married. They had settled into a routine, which all came to an end when Tim was 14, and his father left.
To tell the truth, his father was arrested, and was given many years in prison.