Summer Games by ML

Scully stood just inside the screened porch, watching the two on the
lawn by the lake.  She heard William's childish shrieks of glee, his
favorite blanky tied around his shoulders like a superhero.  He knelt
on the old gurney, his hands gripping the straps tightly as his dad
pushed it across the grass.  Popcorn the dog ran circles around them,
his ears flying with the wind of his passage and his tongue almost as
long as his ears.

She smiled and paused a moment longer in the doorway, her hand
stroking the cool glass beads on the edges of the curtain.  As she
watched, Mulder lifted their son in his arms and spun him around.
The gurney, unattended, rolled across the grass and teetered at the
edge of the dock before tipping over and into the water.

More laughter from the boys of summer on the lawn, and a volley of
excited barks from Popcorn.  Losing the gurney was part of the game.
After they'd flopped on the grass for a while, breathless and dizzy,
Mulder would get the grapple and pull it back out again and stick it
in the barn next to the rusting old ambulance they'd found there when
they moved in.

She'd have the lemonade waiting for them on the porch when they were
done, and a bowl of ice cubes for Popcorn to gnaw on.

End.

Okay, so not so brief.  And a little weird (don't try that at home!)
And no sex!  Sorry, sallie!

The elements:
someone's favorite blanky
a lake house
a beaded curtain
a runaway gurney
a flop-eared dog