I guess he just went back to work after that, although maybe he got himself off really quietly on his own. That sort of thing happened probably four or five times, and I'll spare you the details since it all went down more or less the same (although once or twice he came into the bathroom and sucked me off in the shower, which was a fun change of pace).
At that point it was my turn to take things a little further. I had been thinking more and more about Evan when I got myself off. The slutty look in his eye when I called him a good boy. The ragged moans he let out when I fucked his throat. The way his waist tapered down to very grabbable hips. Above all, the slick, reddened rim of his asshole around that dildo on the floor. One time when he was bent over my cock, I started wondering - hat would he do if I pulled his pants down for a round two?
I had gotten home late one night and was pleasuring myself to just such thoughts before bed when I decided, fuck it, I wanna make this happen. It was late and Evan's room was dark, but when I listened at the door, I could hear faint rustling noises as he shifted in bed. He would have heard me jacking off - I didn't control myself at all these days, so he'd know exactly what I was doing - and I was hoping to hear him doing the same.
"Hahhh..." It was muffled, but I caught a sigh, the same one he let out when he pulled off my cock to take a breather. (Good little slut he was, it had only happened once.)
"I hear you, dude. I'm coming in," I announced loudly. He looked up at me needily in the light from the hall. I pulled back the covers and laid down next to him in bed, spooned up to him.
He was wearing a thin t-shirt and no underwear. It was the first time he'd been in any state of undress since our first encounter, and I began to take advantage. One hand roamed all over his bony hips, hairless thighs, and pert little ass, while the other brushed his nipple. I'd been in that position with girls before, but it was novel doing it with someone taller than me.
His entire body shivered each time my hand went over his nipple. It drove me a little wild. My fingers ventured into his asscrack, and found the ring-shaped base of a buttplug, slippery and warm.
"Ahhh... fuck me," he groaned into his pillow. It was the first time I'd heard him say anything like a proper sentence during one of our little encounters. I wrapped my hand around his cock.
His cock was delicate and thin like the rest of him, average length but probably no more than two fingers' girth. The tip was dripping.
I reached behind him and tugged the plug out, eliciting a grunt. "You want this fucking cock inside you, slut?" I muttered into his ear. My other hand was still moving up and down his leaking cock.