Of all the unusual email exchanges in my Inbox, this was probably the most bizarre:

'Jim Would you like to come to the seaside with us next month? I want you to film us walking round the town with filled knickers and maybe more.'

Jim's reply was equally off beat:

'Yes! Count me in but only if I can wear a filled pair of Julie's panties too.'

We chatted some more and agreed Jim and Julie would walk round the town in filled underwear and I would film them. We had a plan!

And so, after a long train ride to somewhere well away from home it was Jim and Julie who slipped off their daywear in front of me in our hotel guest room on a sunny Saturday afternoon. We opened the 'splosh suitcase'.

'We must be mad!' said Jim.

The ice coating of nervous apprehension was broken.

'Totally crazy' replied Julie and flicked Jim a pair of lace-trimmed white satin panties.

'Having second thoughts? I'm still game if you are' she said.

It wasn't a particularly sexy look for either of them. The underwear was nice enough but the next layers were passion killers. To keep everything in place the pair of them pulled on thick glossy tights, a large adult nappy each and another pair of tights on top. Between the first and second pair of tights we duct taped the legs of their nappies to the black nylons. God knows what the guests in the next room thought of the sound of all that duct tape being torn into strips.

I couldn't resist filming them filling each other's underwear. It reminded me of a ritualistic Japanese game show with 'ooh's' and 'aah's' of disgust and delight. From past experience we knew we had to avoid too much liquid we didn't want the afternoon to be over too quickly with an embarrassing leak!

Jim lovingly received a filling from Julie of mashed ripe bananas, spaghetti hoops (with most of the sauce poured away), a very thick mix of porridge, several large chunks of margarine and two sticky chocolate bars for good measure. Front and back of course! In return, Julie took a tin of jellied dog food in the back of her panties with more mashed bananas, ravioli, dry porridge oats, the rest of the tub of margarine and two more bars of chocolate for good measure. Then they taped up the waistband of each other's nappies. What a sight they were! Julie pulled on a large pair of black leggings and a long, floral tee shirt dress, Jim put on a large pair of jeans and a polo shirt. From the outside they looked a perfectly respectable couple! We were off!

Fifty yards down the road and I could barely stop shaking with laughter.

'Stop waddling!' The pair of them were walking along so unnaturally with stick-straight legs it was laughable. Incredibly though, nobody was taking a blind bit of notice of them. Then we turned on to the promenade, packed with holidaymakers. The odd couple, with their packed underwear, mingled amongst the tourists without turning heads. I called them over to a bench seat on the Prom.

'Shall we sit here a minute?'

The pair of them looked at each other.

'Do we have to? I'm enjoying the walk' said Julie

'No, I insist let's have a seat'

With great care, they lowered themselves onto the bench seat. I filmed their changing expressions as they sat.

We sat for a minute. Julie kept adjusting her dress and trying to fiddle between her legs but so far so good everything was staying in place!

More walking, more sitting and a quick trip to a packed seafront bar where a friendly Alsation took a shine to Julie I wonder why! We were about fifteen minutes walk from the Hotel now and Julie and Jim were both more comfortable with their predicament. We wandered into a giant promenade amusement arcade and spent a few minutes playing 'flick a two' and ten pence slot machines. Then I spied it! In the corner of the arcade, looking lonely and unloved, was a giant bucking bronco machine with a shiny plastic saddle and mock-leather reigns. I walked over to it, stopped and indicated to Julie that she should take a ride.

'No way!' she said

'I will if you will' blurted Jim.

That was it. The pair of them rode it, bucking and gyrating on the hard plastic seat. By the time they had both fallen off and landed in a heap on the PVC mattresses a couple of times it was as if they'd taken a ride on a giant sex toy. They both looked flushed and lewd things were hotting up! A dark stain had appeared in the front of Jim's jeans and I could only assume the same was happening under Julie's dress. They both squirmed out of the arcade and I filmed Julie pulling Jim back up towards the pub.

Behind the pub in a secluded courtyard was a bank of large metal wheelie bins. We quickly scoured the surrounding walls for overlooking windows or CCTV. There was no sign of anything untoward just a set of metal fire escape steps leading to a heavy locked door. Julie pulled Jim close to him and groped his butt cheeks as hard as she could. Needless to say Jim returned the favour and the next thing they were both squeezing and smooshing their hands between each other's legs without a care for the consequences. They both looked across to me it was clear they wanted to go further, too turned-on to go back now, but it still seemed too risky to do anything in broad daylight even behind the wheelie bins in this quiet courtyard. Jim pushed up the lid of a big green bin. It was almost empty inside, just a couple of filled black bags and the characteristic wheelie bin stink. I opened the lid right up and the pair of them were in it quicker than two pigs in a new sty.

I kept filming, safe in the knowledge I could close over the lid if anyone appeared round the corner. Kneeling in the bottom of the wheelie bin, Jim had Julie's dress hauled up her back and was pulling at the hook and eye clasp of her bra to get her tits out. Without a care he just pulled the clasp apart dragged the bra off her back and filled his palms with her boobs. Julie was equally rough with the waistband of his jeans. She couldn't rip the denim but quickly had the jeans pulled down to his knees and set-to at his bulging tights!

Pulling away the waistband duct tape she yanked open the front of the nappy and dragged at the material until his angry cock burst into the daylight all slathered and glistening in filth. Jim took her shoulders, pushed her head down to his erection and wiped it through her hair before carefully turning her head and filling her mouth with his dick for the benefit of the camera. None of us had said a word for at least ten minutes. There was no need. We were all too turned-on for chatter.

After receiving a dribbly blowjob, Jim turned his attention to Julie's filled rear end. Still kneeling in front of him, he slid his hand inside her leggings, eased apart the duct tape and pushed straight down into her mushy knickers. She winced in delight his fingers clearly meeting their target quickly. With his other hand he tweaked at her cherry-red nipples and within a matter of seconds she was consecutively crying out and biting his shoulder overcome by a massive orgasmic blast. He pulled his filthy hand from her packed panties and made her weakly lick his slimy fingers. Within a few minutes she had become the submissive stooge ready to meet her fate.

Her turned her round and nudged her forward onto her elbows with her bottom raised ready to be resolutely fucked on the bin-juice stained floor of the dumpster. Changing his mind he pulled her back up and pushed the two filled bin bags under her front for her to rest on for her fucking.

Then he lined up behind her, pushed the tee shirt dress up her back again and carefully slid her leggings and underwear down until it all sat in a filthy puddle between her knees and her shiny white bottom was exposed for action. I was literally struggling to hold the camera steady at this point.

Jim looks up at me and with a wink says 'Permission to enter?'

'Go on Jim, do it' is all I can muster as he pushes himself forward and fills her. Julie has her face 'sexily' pressed into a bag of pub rubbish as he steadily reams her pussy. At one point he pulls her upright, fondling and squeezing her tits right in front of my camera before pushing her back down and continuing the relentless doggy fucking. But I know he can't last forever and I can see the expression in his face changing as his sap builds and he jokingly, croakily asks for permission to cum. As if I could stop him now! He jerkily unloads at least half a dozen spurts inside her before collapsing on her back then sitting up and carefully pulling back into place all the layers of filled underwear as best he can. What a sight!

Bang! The peace is shattered as the fire door above us bursts open and four beer-bottle wielding blokes pour onto the fire escape steps whistling cheering and clapping. Oh fuck!

'Thanks for the show guys' shouts one of the blokes in a Scouse accent and points up into the air with his beer bottle. About thirty feet up on a pole directly above the bins is a CCTV camera unblinkingly staring straight down at us. Bollocks! How did we miss that?

'You fuck each other in wheelie bins often?' shouts another. More laughter.

'Just as well it was empty.' he adds

Whatever they said now we just had to take it. These guys clearly weren't too worried about having their public decency offended they'd just enjoyed a free sex show beamed straight to the office tv monitor.

Jim and Julie climbed out of the wheelie bin.

'What's with the big saggy leggings on the bird?' asked the Scouser.

'What's in 'em?' he continued, clearly feeling brave.

'It's err food' I tell him

'Food! What kind of food?'

'Bananas, porridge, pasta. That kind of thing' I say.

The resulting laughter confirms they are having a complete 'what the fuck?' moment.

'That's mad! And what stops it running down her legs?' says Scouser.

I peel down the side of Julie's leggings so the nappy is clearly visible.

'A kid's nappy?' comes the loud exclamation.

'Kind of' I said.

Roars of laughter ensue and we try and start the walk of shame past the end of the fire escape steps.

'I don't like yer' nappy but I love yer tits' shouts one of the blokes.

'Show us yer' tits again love' he says.

Jim is laughing now and takes the hem of Julie's tee shirt dress and pulls it right up to her shoulders exposing her braless boobs.

A massive cheer erupts with more laughter as the end of the building and the end of our walk of shame gets nearer. We might just have got away with this! One more flash of Julie's tits, another cheer, and we are round the corner and out of sight.

The fifteen-minute walk back to the hotel comes with a mixture of relief, embarrassment and ridiculous excitement! I walk alongside and film the filthy couple who are now literally oozing with splosh sex, but incredibly no one barely notices.

Back in the hotel room Jim jumps straight in the shower and I cart Julie to the bath next door and dump her in it. We look at each other scarcely able to believe the latest twist in our threesome adventures. It's my turn for relief. We both strip and I use the sodden nappy and knickers as a filthy face, hair and body swab before bending her over and taking her there and then in the bath tub. I barely last a handful of seconds. What an unbelievable afternoon!