Blow inside her

"Don't stop!" Alaina insists. "I'm on birth control, I swear, just keep fucking me!"

Well, that's all the permission you needed. You lose control of the bucking of your hips and push yourself even deeper into the girl that lives across the hall, feeling the warmth spread from your balls and flow up your shaft until it spills out of your tip, filling her up with your sperm.

Alaina slows her bouncing, shivering as her hands rest on your chest. "Wow," she says, her voice cracking a little. "That was... great."

"Yeah," you mutter. "Yeah, wow."

Alaina leans down and kisses you on the lips. She sits on top of you for another full minute before she peels her body off of yours. You can see your cum running down the inside of her legs, and your dick is still sticky with it. She grabs a box of tissues off of Dr. Porter's desk and grabs a few to wipe herself off before handing you the box. "Not exactly a wet wipe, but it's better than nothing. I'm glad Dr. Porter thought ahead more than we did."

"I was mostly thinking about how to get into your pants," you admit.

"Aww," Alaina says, still wiping up your cum. "Well, thank you. Same to you." She runs over to where she left her clothes and slides on her panties. "These are going to be really dirty when I do laundry later," she says. "But I'd prefer to have that than to walk home with your cum on my legs, even if it is pretty hot to have it inside me." She winks at you. "Do you want to head home right away?"