The first inkling that something interesting was happening between dad and me came about because of my taking up running for exercise. My dad was a big guy, about 6'3 and well over 200 pounds, so I'd always been worried that I'd get a gut like he had. It looked fine on him, with his height it was proportional, but I was just 5'10, I didn't want a belly. One day when I got home from my classes I just started running. That night at dinner my dad asked how I liked it.
"It was okay except my balls went numb." I said.
"Huh?"
"Yeah, when I was running. It was a weird sensation."
"What kind of underwear were you wearing?" He asked.
"Just my boxers." I said.
"Well there you go." He said. "You need more support. A jockstrap would be best -briefs at least."
"Tighty-whiteys? I haven't worn those since I was ten years old." I said.
"You want me to get you some? I can pick them up after work tomorrow."
"Sure, thanks." I said. There was nothing unusual about his offer. In the five years since mom left us dad did all the shopping and I did the cooking and cleaning. The apartment wasn't big, so it wasn't too much work or anything.
The next day I asked about the briefs but he said he'd forgotten. The day after too. On the third day he forgot I was kind of annoyed. "Every time I run my balls go numb. I could be doing serious damage to myself."
"Sorry kiddo, just slipped my mind." He said. "I don't have anything that would fit you, but I think your mom might've left some stuff that would."
"What, like panties?"
"Yeah, she left some clothes and stuff. I just stuck it in a box. It's not like its lingerie or anything. Come on." I followed him to his bedroom and he pulled a box down from the top shelf of his closet. He opened it up and dug around for a minute then pulled out a stack of panties.
"I don't know about this." I said.
"Don't be such a baby." He said, holding up some lacy black ones. "Here these should fit you. Try them on."
"This is weird." I said.
"It's better than doing damage to the family jewels. Just try them on and see how they fit." He tossed them to me and I stood there awkwardly holding them. I figured he was right and it might look strange if I refused. I didn't want to protest too much.
I took the panties to the bathroom and shut the door, with dad standing just outside. I took off my pants and boxers and slipped on my mom's panties. They were French-cut and showed off a lot of my ass. I was standing in front of the full length mirror on the back door, and I began to get hard. I was adjusting myself when my dad asked how they fit. "I guess they fit pretty good." I said.
"They're not too tight?" He asked as he opened the door and walked in.
"Dad!"
He laughed. "Nothing I haven't seen before." He said. "Can you move around in them?"
"Yeah I think so." I said.
"Do some jumping jacks or something. Test them out."
I looked at the floor, afraid that if I made eye contact my dick would get even harder than it already was, and did a few jumping jacks. "Yeah, they're fine." I said.
"Do they ride up too high in the back?" He asked. "Turn around." I turned. "They look kind of cute on you." He said. The next thing I knew he gave my ass a hard slap. His rough fingers lingered for a second and a wave of electric tingles went through my dick and balls. He laughed and left me there.
The next day he still hadn't gotten me the briefs, and he said I could just use another pair of panties. The day after that I found the stack of my mom's panties in my underwear drawer. I stopped asking about the briefs.
Soon after that the physical contact between us increased. It seemed like he was always giving my playful little shoves, or messing up my hair. I would get turned on when he touched me, but he pretended not to notice.
Then something odd happened. I noticed that some of my boxers were missing. Up until then I had only been wearing the panties to run, but now I didn't have enough boxers to make it through a week, so I started wearing the panties to my classes. I liked having a secret and feeling the lace against my ass during the day. The next time I did laundry I found that I was down to two pair of boxer shorts. That was when I knew for sure that my dad was behind it. He'd been throwing away my boxers so I'd be forced to wear the panties.
I thought he might've just figured out that I liked guys and this was his fucked up way of letting me know it was okay. But the next time I did laundry I found a pair of my panties in his hamper, and they were stiff with dried cum. He was jacking off into my panties! I kneeled down right there in the laundry room and imagined him doing it in front of me. I imagined taking his cock in my mouth and fondling his balls. I undid my pants and only had to give myself a few strokes before I came in thick spurts all over the linoleum.
That night I made dad's favorite dinner, pork chops with apple sauce. I had on my mom's chocolate colored lace panties under my jeans and I was feeling very sexy. Dad cracked open a beer and started in on his meal. I always loved to watch him eat. "I've been meaning to talk to you about something dad." I said.
"Oh?"
"I've been thinking it might be time for me to move out -get my own place."
My dad stopped eating and looked at me. "Why?" He asked. He looked worried.