On her.

Even though Alex said she has morning-after pills and promised to take one immediately, you don't want to risk knocking her up, however the remote chance. Fighting against your lizard-brain's need to reproduce, you yank your cock out just before it starts spurting thick ropes of jizz on her back and ass.

"Oh yeah..." she sighs.

After the last drop of cum drips to the floor, you collapse next to her on the floor and she gives you a fierce kiss.

"That was amazing!" she giggles.

"Yeah..." you groan and close your eyes.

"Take a rest while I hop in the shower," she smiles. "I can't go to class with cum on me!"

You nod and watch with tired eyes she gets into the shower.

"Yeah," you nod and watch with tired eyes she gets into the shower, not really wanting to leave her.

"Do you mind picking up more condoms after you finish work?" she giggles.

"Oh? I thought you're getting some?"

"So we won't run out for our second date tonight!" she laughs.