End of freshman year my parents had picked up most of my stuff the week before, but I still had a couple of finals. I got a ride home from Tom, a guy in my dorm who lived in a town near mine. I didn’t really know him very well, but we got along okay on the three-hour drive north. As we neared the city he suggested we stop at his house first to unwind, maybe have a dip in his pool. “Your parents won’t mind?” I asked. “Naw, and anyway they’re in Cancun. My sister Ronnie’s the only one home.”

“I didn’t know you had a sister,” I said, for lack of anything else to say.

“Yeah, we’re twins, but nothing alike. She’s going to Cal on a full ride. Volleyball.”

I sometimes wondered what it would be like having a sister, but I didn’t say anything about that to Tom, and we pulled into his driveway. His house was one of those mini-mansions, nothing like what was in my little middle-class suburb just three miles down the road.

I left my suitcase in the car and followed Tom into the house. “Ronnie,” he called out, but no answer. “She’s probably off with friends, though her car is here. Or maybe she’s out by the pool.”

We went through the house to the back deck, and sure enough Ronnie was in the pool doing laps. It didn’t register at first that she was naked.

“Hey, Ronnie, we’re here,” Tom shouted.

Ronnie just kept swimming.

“Let’s join her, before she uses up all the water,” Tom said, beginning to peel off his clothing.

“Yeah, but I don’t have a suit,” I objected.

“No need. We’re very informal here.”

“I don’t think I’d feel comfortable.”

“Okay, you can borrow one of my suits. Inside, up the stairs to the right, second bedroom on the right, bottom drawer of the chest. Bring out a couple of brewskis on the way back.”

“Make that three.”

It was Ronnie standing in the shallow end of the pool, her breasts bare, her pubic hair at the water line. I guess I stared. She gave me a wave and resumed her laps. I hurried inside, trying to remember Tom’s directions.

Upstairs I found the chest in his bedroom and several swimsuits. Tom is somewhat bigger than I am. I picked out the smallest suit, but it still sagged a bit more than I would have liked. I spent more than a moment debating what to do, and finally I went back downstairs to the kitchen. I was about to open the door to the mammoth refrigerator when Ronnie appeared, coming from another doorway.

“There you are,” she said. “I thought maybe you’d gotten lost. Or made a run for it.”

“No, I just...” I didn’t know what else to say.

She stepped past me and opened the refrigerator. “Mmm, nice and cold,” she said, and she handed me a can of beer. “Would you like an apple?” she asked. “They’re very good, very juicy.”

“No, I’m good,” I said.

“Tom says maybe you’re a little shy,” she said.

“I’m just...” Again I didn’t know what else to say.

“Your dick isn’t shy,” she said. I looked down and saw that the suit had indeed sagged, and my penis was poking up over the waistband.

“Maybe I could tuck you back in,” she said, and before I could do anything, her hand had surrounded the stem of my erection. Her hand felt very cold, but that didn’t have any shrinking effect. If anything, my cock did the opposite of dwindle.

“Mmm,” she hummed. “Feels good.” And she began stroking me.

“Oh God,” I yelped. The beer can hit the floor and exploded same moment as my cock.

I was so embarrassed. I needed to disappear. I needed to get out of there. Without a second thought I raced across the kitchen and back up the stairs, those useless swimming trunks almost tripping me, and I staggered into Tom’s bedroom, the trunks now almost to my ankles. I kicked them off, not caring where they landed. Now what? I retrieved the swimming trunks from where they’d landed, right atop Tom’s bed. I couldn’t help but notice a splotch of cum on them. And there was another splotch on Tom’s bedspread. I was suddenly so angry. I used the trunks to mop what cum had remained on my penis, and then I scrunched the trunks in my fist. What to do with them? I looked around the room. There was a wastebasket next to a desk. I dumped the trunks into the wastebasket. I spent some time staring down into the basket at the tangled swimming trunks. Enough of this, I thought. I found my clothing and got dressed.