The girls were still sleeping when Marie and I got up to shower -- "I love the en suite," Marie smiled -- and I wrote a note for them before we left. "Gone to mess with the fabric of reality -- see you for dinner. Xx"
We took Marie's car, and she drove us to the out-of-town science park where the physics lab was located. The keycard from the lanyard round her neck, and a quick tap at the keypad -- "You'll need to know the combination anyway --" and we were in, walking down gleaming corridors to the high-roofed space where Marie and her team worked.
Marie walked over to a semi-circular console, a row of screens lighting up as she threw switches. "Pull up a chair," she invited.
She picked up a telephone handset, dialling. "Hi, it's the lab," she said when the call was answered. "Yes, about ten minutes."
I looked at her enquiringly when she put the phone down. "The experiment uses quite a lot of power," she explained. "We have to let the utility company know when we're about to operate."
More switches, and a distinct humming sound filled the air. Marie adjusted verniers, checking readings, then pointed across the lab. "Everything's ready -- watch."
I followed thick cables from where we were sitting, leading to a raised platform which supported something like a circular segment from a huge industrial turbine, hollow in the middle. Marie counted under her breath, and closed the last breaker. "Oh -- my -- god," she enunciated.
Filling the empty circle was now a rippling surface of velvet blackness, seeming somehow to swallow the light falling on it from the fluorescent tubes above us. "Is it supposed to do that?" I asked.
Marie's hand covered her mouth in astonishment. "We've put high speed cameras on it, of course. The longest the effect's ever lasted before was a millionth of a second."
She kissed me hard on the lips. "I knew you were a genius. Those equations were the key."
She grinned. "Ever fancied a trip to Stockholm?"
I glanced again at the rippling circle. "Er, Marie... Does it, well, go anywhere?"
"We'll have to prepare a probe," Marie said decisively. She tapped keys, then pulled the breaker. The rippling surface collapsed, my eyes momentarily failing to make sense of what I saw, as though light from dimensions beyond the usual was falling on them.
She took a deep breath. "This could be the biggest thing since the Manhattan Project."
I nodded. "We should celebrate. Shall we get back, tell the girls?"
Marie made sure the console was completely shut down, then we retraced our steps to the car. "I suppose I should call the Vice-Chancellor," she said thoughtfully.
"We can do that from the house," I suggested. "Let's pick up something to drink, and we can phone for takeaway -- you and the girls can choose."
We stopped off at the supermarket, and Marie looked thoughtfully at the selection of bottles. "What do the girls like?"
I couldn't help a smirk, and she threw me an enquiring look. "What?"
"I was remembering a slightly tipsy night with Beth and a friend while we were on holiday last summer," I grinned. "But I don't think grappa is quite what we have in mind today."
I picked up a dark bottle. "I think this'll be to their taste, though."
We paid for our selection, then carried on to the house. Marie parked, and we left our purchases in the kitchen, taking off our shoes and climbing the stairs towards the bedroom. When we reached the landing, Marie held up her hand, stopping suddenly, then gave me a knowing smile, putting her finger to her lips to enjoin silence. "Oh, Beth," I heard Sarah's voice quietly but distinctly from the bedroom, full of unmistakeable passion.
I held my breath as Marie walked softly to the bedroom door, then beckoned me to join her. I glanced with her round the edge of the door, and threw her a smile of my own. Sarah and Beth were on the bed, Sarah lying back against the pillow while Beth's fingers stroked down her throat, then onto the curve of one breast. Sarah breathed in, her chest rising, bringing Beth's fingertips into contact with her nipple. Sarah gasped, an almost hungry look filling her face. "Your mouth," she pleaded, and Beth bent to kiss the nipple, then encircle it with her lips. Beth's fingertips drifted to the other breast, and we heard Sarah's soft moan. She parted her thighs, her own fingers exploring herself, circling her nub with increasing urgency. "Beth --" she gasped, and Beth teased her, fingers stroking the inside of Sarah's thighs making her squirm. "Oh --"