Our relationship was always that of two friends who just happened to enjoy sex with each other. There was hardly any kissing and definitely no romance. We'd come home after a baseball game or a movie and When I was twelve and Jim was seventeen, both of our mothers became pregnant at the same time -- with daughters. Our families were pretty close already, and when the girls were born they were given similar names, Lacey (after my grandmother) and Tracy (after a long-dead great-aunt). Jim and I managed to ignore our younger sisters for as long as we possibly could, but eventually we decided that we should include them in our private moments. This is the story of how that happened.

After Jim graduated from college, he moved away and got a good job in a neighboring state; but not long after my 23rd birthday, Jim was transferred back to our home town. Our families had a "Welcome Back" party for him, and afterwards he came to visit me in my apartment.

First he sucked me, then he fucked me, and finally we rested in bed together, still naked and slightly sticky with sweat and cum.

"I missed doing this with you, Ric," Jim said.

"Yeah, me too," I said. I told Jim that I'd been dating a lot of girls, but I'd also been going to cruise spots around town for a blowjob every now and then.

"I was seeing one girl for about five years," Jim mused, "and at least once a week I'd go down to this adult bookstore and fuck around in one of the video booths. You ever been to a glory hole?" I nodded.

"Well, it was pretty cool. You know, Ric, now that I'm back in town ... maybe we should become roommates."

I looked at him, surprised. "I don't know about that," I said.

"Why not?"

I shrugged. "I have girls over here a lot ... sometimes other guys. I like my privacy."

"We'd be roommates, for Christ's sake, not boyfriends or anything. Ric, we're cousins! We can't like go out with each other!"

"I know, I know. Let me think about it."

He spent the night at my apartment for two whole weeks before I gave in.

A few months after that, my mother asked me to watch my sister Lacey for the weekend while she and Dad went out of town to some snooty wedding. Lacey was only eleven and I wasn't looking forward to a whole weekend of babysitting.

Jim and I had separate bedrooms, so we weren't worried about the propriety of our sleeping arrangements. Lacey stayed out on the couch. On Friday night I checked on Lacey, then walked down to Jim's bedroom and knocked on the door.

He was wearing only underwear; I was wearing only a bathrobe. I opened it and showed him my hard cock and he pulled off his underwear. Soon I was behind him, fucking his warm, buttery ass, running my hands across his firm back and sides. Before I finished, Jim told me to pull out. He turned over and pointed to his hard cock. I finished myself off and shot dripping wad after wad all over Jim's crotch, then licked it all up before I sucked him to orgasm. We were actually pretty quiet throughout the entire encounter because we didn't want Lacey to hear.

"That was great," Jim said, patting and rubbing my shoulder, "but remember, you can't sleep in here." I smiled and stood up, putting my bathrobe back on, then eased his door open and tiptoed down the hall. I could see the reflected flicker of the TV on the walls, so I assumed Lacey was still awake. I peeked around the corner into the living room and saw something amazing.

On the TV, two beautiful nude women were kissing and rubbing each other's bodies. It was one of those late-night cable movies with many gratuitious lesbian scenes. And on the couch, Lacey was spread-eagle naked, with both hands busy rubbing her little hairless crotch.........(cont)