It was bound to happen. Up to this point, there had still been something surreal about our experiences in the Family Changing Room. With Caroline present, the unspoken interaction between Stephanie and I was almost a separate reality. I was able to keep my emerging feelings at a safe distance.

The next Saturday was another split soccer schedule for the girls. Carol had worked late the night before, so I took the bullet and got up early to take Steph to her game. As we were getting ready, I called across the hall to her room.

"Bring your stuff if you want to swim after."

She stepped into her doorway to answer me. She was wearing only her underpants.

The sight was jarring to me. It was the first time I'd seen her in any state of undress at home since she was much younger. She smiled. Her eyes said, see Daddy, I can do it here, too.

"OK," she said. We looked at each other for a good ten seconds before returning to our tasks.

After her game (which they actually won, I think) we arrived at the pool. As she had before when we came there by ourselves, she took my hand in the parking lot. As her fingers intertwined with mine, my mind flashed back to the image of her in the hall that morning. I closed my eyes briefly to get a better view of the memory. As I did, my body started to betray me.

I mentioned that Carol had worked late the night before. In fact she'd had a very busy week, and we hadn't made love since the previous Sunday. This was unusual for us - we generally couldn't keep our hands off each other for more than a day or two. So, I was running at an abnormally high hormone level.

I felt it coming on, and pretty soon realized that I wasn't going to be able to do much about it. This wasn't going to be a short, passing little bout of swelling. This was going to be one of those monstrous, insistent, impossible to ignore hardons. An erection for the ages. Immune even to thoughts about getting kicked in the nuts and nuns that look like Pete Rose.

By the time we reached the door to the Family Changing Room, I was so stiff I had trouble walking. Fortunately I was wearing my favorite khaki shorts which have some room to spare. I'm about seven and one-half inches when hard, but this one felt like ten. Somewhat constrained by my boxers, it was extending down my leg in a most uncomfortable and awkward way.

Stephanie tossed her bag on the bench and quickly pulled her soccer jersey over her head, chattering away about some girl on her team who used to be her best friend but wasn't anymore. I don't remember why the falling out occurred, as I was having trouble listening. There was blood rushing through my ears, which is amazing since I really felt like all the blood in my body was in my cock.

Stephanie looked at me. My turn to take off my shirt. So I did, more slowly than usual, trying to buy time. We sat on the bench and took off our shoes. I was able to use this moment to surreptitiously adjust myself so that my cock was up against my belly. Sweet relief from pain, but it did nothing to reduce the swelling.

Stephanie stood up in front of me. In one motion, she took down her soccer shorts and her underpants together and stepped out of them. Now totally naked, she gave me the look. You're turn, Daddy. No need to say it out loud.

I tried to distract her by asking a few questions about her friend. She gave me short answers, and continued to give me the look. We fell silent. Her eyes showed disappointment. And finally she broke the rules, giving voice to our tacit agreement.

"What's the matter, Daddy?"

I looked at the floor, knowing that I was bright red.

"I can't right now, sweetie."

"How come? It's your turn."

"I know"

She bit her lip. "Are we being bad, Daddy?"

"No, honey. It's not that."

"Am I bad because I want to see it?"

That didn't help. I shook my head, but didn't say anything. Her disappointment was turning to guilt and sadness.

"I won't tell Mommy," she blurted out. "I'm not a baby like Caroline."

It surprised me to hear her say this. I hadn't really been thinking in those terms, and it was a little shocking to realize that Stephanie had been. Is she really old enough to see her mother as a rival? For a moment, the notion of Carol discovering the nature of our game had the promise of deflating me. But when I saw the look on Stephanie's face, I knew that she completely meant it. This game was just for us. Blood rushed back to my penis, and it spasmed, releasing a substantial stream of precum. I felt the warm thin liquid diffuse into the waistband of my boxers.

I looked her in the eye. "We haven't done anything bad, Steph." Not yet, I almost added.

"So what's the matter, Daddy?"

I had to decide whether to break our trust. In the end, I couldn't.

"My penis is hard." I heard myself say it, softly but clearly.

She looked confused. "What do you mean, Daddy?"

A second later she figured it out. "Oh," she said, flatly, cutting off any response.

I guess Carol had told her enough about the mechanics that she made the connection.

I saw the realization spread from her wide eyes into a deepening glow on her cheeks. The red tide moved over her chest, and all the way down her legs. She almost looked sunburned from a long day at the beach. She folded her arms in front of her, hiding her sex from me. At the same time, her eyes searched my crotch. Now that she was looking, she saw the evidence outlined in my shorts.

"Oh."

"Ya," I said. "I'm sorry." I didn't know what else to say.

She nodded a little, looking very pensive, and went back to the bench. She pulled on her swimsuit and headed for the door. As it was closing behind her, she glanced back. I was still sitting on the bench, looking embarrassed and confused. She hesitated for a moment before coming towards me. She quickly bent over and kissed me on the cheek, and then ran for the pool without saying a word.

I've never loved her more than I did at that instant.

End of Part 5

To be continued