Yes, it was the right thing to do

"Come on," I said, extending a hand to help her up, "Let's get you to bed. Maybe we shouldn't have let you end up with the dirty pint."

She didn't really respond, just slipping her arm around my shoulders and leaning all her weight on me so I wasn't so much supporting her as dragging her to her room.

"Do you have your key?"

"Bra," she mumbled. "I keep it there... so it's safe."

"Are you able to get it?"

"Prolly not. You'll have to..." She trailed off, her eyes turning away from me to stare at the floor, but I knew what she meant.

I looked back at the group behind us. Emily was still in the bathroom, and I felt like asking Laura for help would be making too big a deal of the whole bra thing. Besides, my intentions were honourable.

"Okay, uh... Which side?"

"Left!" she announced confidently.

I adjusted her position to make it easier to reach and slowly, gingerly, ran my hand down into the far left side of her bra. Feeling nothing, I moved along the small swell of her breast, mentally fighting my growing erection. I heard a small gasp as my fingertips brushed a small, soft nipple; on the irresistible second touch (hey, can you blame me?) I was surprised to feel a harder, more erect mass in its place.

"Wait, no, right. Sorry."

I rolled my eyes, quickly withdrawing my hand from her bra and sliding it instead down the right hand side, where it immediately made contact with the keycard to her room. I unlocked the door, pushed it open with the weight of our bodies, and led her to her bed.

"Can't sleep like this," she said groggily.

"Like what?"

"Clothes. Need pyjamas. For sleep."

"I, uh... You'll have to deal with it for tonight. It'll be okay."

She nestled into a comfortable position on the bed and closed her eyes.

"Sam?" she half-whispered as I turned away.

"Yeah?"

"Thanks. You're a great guy. I like you."

"I quite like you too," I replied, leaving her keycard on the side as I slipped out of her bedroom and, finding the communal area deserted, into my own.

As soon as I made it to my own bedroom, I pulled my boxers down to release my throbbing cock, then gripped it loosely and began to stroke softly, thinking about copping a feel of Allie's sexy tits, Laura's pierced left nipple, and Emily's vague same-sex sexual experience (which in my imagination was her masturbating to lesbian porn; for some reason I found that very hot). But my mind kept returning to the hot blonde in the window.

I stepped over to the curtains and pulled open a small gap to peek through, but the window that haunted me was covered by an opaque blind. Disappointed, I waddled to the bathroom and pumped my hard cock furiously, my eyes scrunched up as I thought about the mysterious girl's plump breasts and taut, toned stomach. I imagined what the rest of her might look like – long, smooth, athletic legs and a tight little bottom – and what it would be like to have her ride my cock, filling her as she rocked herself to orgasm. I came with a loud grunt, bucking my hips as I spurted an absurd quantity of semen into the white porcelain toilet bowl.

Spent, I wiped myself up and returned to bed, sleeping soundly in my post-orgasmic haze until morning.