Can't stop now

"Are you...are you wet by chance?" you ask, hoping this isn't pressing her too far. Beth's face goes red at what you're implying.

"No not at all," she replies suspiciously. You decide to address that suspicion.

"No worries, I just wanted that glisten again," you try to put a note of disappointment in your voice. "Actually, would you be able to use your saliva? Don't have to blow me, just spit in your hand and work it up and down the shaft of my penis."

Beth hesitates and you see her about to protest but your earnest expression helps her believe you. She grimaces once when she spits into her own hand, and a second time when she starts stroking your cock. You make sure to capture these moments on camera. Once coated in her saliva you move her hand away, pretending you want the perfect shot for your portfolio.

"Hold on, my knees are hurting, have to shift a little bit..." you say as you move slightly. As intended the head of your cock penetrates her pussy!

"Ah shit sorry..." you start as she makes a sort of screech and shifts herself up. Your cockhead pulls out of her. "I know you said no penetration, but I think that might have been the perfect shot. It can be just the tip, but the glisten with the head of the penis disappearing...well it would make a great shot."

"I...think we should stop, this is going a little far," Beth says. She doesn't move just yet so you think you can persuade her.

"I haven't told Eve but I'm nervous about getting into these classes, it's a big deal at this school, so I really appreciate you helping me out here," you press her.

She thinks for a minute, biting her lip worriedly, which just looks sexy to you. As she mulls it over you take a second to check out her body, your cock's resolve hardening even more than itself.

"Ok...but just the tip right? For your portfolio?" she questions you hopefully.

"Yeah of course, I desperately need this," you reply. You at least know you both aren't talking about the same thing.