When I entered the aisle with the alcoholic products, I heard her say
to her brother, "... and they will not let us buy any booze for the
party as we're too young."

She was certainly right as she was thirteen and her brother eleven.
They were black, slim, long legged and tall, even though he was about a
head shorter than her -- for now. They had sparkling blue eyes that
made you look twice, every time you saw them. She was barefooted and
wore a loose, white silk dress that outlined her nice breasts every
time she moved. He too was barefooted, but wore a tight, sleeveless top
that showed off his muscular torso and loose shorts.

"Well," I said. "Maybe I can help?"

"Please!" they said as one.

They wanted a bottle of Baileys, a bottle of Glenfiddich and a six-pack
of beer, which I put into my trolley. "You'll have to get it at the
car," I said. "As they'll be rather full of suspicion if I give it to
you in here."

"That's OK," they said.

After paying for all the goods, we went to the car which was parked
next to a wall. I opened the front door and put everything on the seat
and started to rummage around to find some bags for their drinks.

"We'd like to say thank you for your help," they said.

I heard the rear door open and said, "My pleasure."

I turned around and was slightly taken aback as they were both
undressing. She slid the dress over her head and was stark naked below,
letting me enjoy her small, firm breasts and hairless pussy with a
rather big clitoris. He had already removed the top and had his shorts
around his ankles. He had a relatively big erection and was as hairless
as his sister.

"We'll make it your pleasure for sure," he said and pulled my shorts
down. My dick slapped into his tummy and stood erect and proud,
twitching slightly.

Luckily for us, the open door, the car and the walls shielded us from
the rest of the parking lot so we weren't arrested for indecency (and
worse).

He knelt in front of me and bore down on me so fast I hadn't time to
take it in before I was buried in his gullet. She pressed herself
against my back and rotated her chest so I really could feel her hot,
erect nipples caress my skin. She gyrated her hip against my bum and
let her hands slide across my front, teasing my sensitive nipples now
and again. He bopped up and down and his tongue worked hard stimulating
the underside of my dick.

I was in seventh heaven (or at least almost).

When she started to lick my ear and breathe heavily into it, I was
finished. I started shooting into his gullet. And I kept shooting. And
shooting. And shooting. And ... well, everything has an end ... I
stopped shooting. He looked at me with his smiley blue eyes as he
slowly pulled back, letting my dick go with a plop. He licked his lips
and gave my dick a last kiss.

He sat up on the seat with his feet dangling out the door and she
scooted around me to quickly sit herself right centred on his erection.
As she started to kiss him, she patted her back, indicating that there
were room for me. I didn't need more encouragement and stepped behind
her, reaching around them to frantically rummage through the shopping.
I found what I looked for and suddenly her bum and my hard dick were
covered in extra virgin olive oil.

I pressed against her dark sphincter and after a little coaxing and a
lot of moaning, the head disappeared into her hot bum. My hands were
all slippery with oil and I found it hard to hold on to her, but all
the same, I managed to bury my dick completely inside her.

She rode him gently and I got a free ride that way and all too quickly,
she started to moan as she had an orgasm. In due course, her orgasm
triggered ours and as one we started to deliver our hot sperm inside
her. When we were finished shooting, she jumped off and held our dicks
together so she could clean us thoroughly before we had to get dressed
again.

The oil had gone all over us and we were quite slick and shiny, but as
they say, olive oil is good for your skin.

I pulled my shorts up and looked at the two as they leisurely dressed.

"Would you like a lift to your party?"

"Yes please, Dad."