No way

"I don't think we have that much longer," you tell her. "Just one more pose really."

You circle around her and kneel between her legs. Her eyes widen in alarm and she closes them, "Uh we're not having sex. Like. At all."

Feigning innocence you reply, "No I know, I would never cheat on Eve anyway, just need the appearance of eroticism for this series is all. Really appreciate you helping me with all of this."

For some reason, probably related to all the changes Miles implemented with the ring, she believes you. "Alright, but no penetration, ok?" she gives in and lays back down, spreading her legs for you. You dip down a bit so your cock bounces off her clit, which gives her a start. Using your free hand to stroke yourself you let your dick smack her clit on the downstrokes while taking pictures with the other.

The pictures are objectively awful from an art perspective, more like reluctant porn than anything, as Beth is clearly uncomfortable. She's been looking down as best she can to where your cock is, no sexy expression except for the confusion and reluctance on her face that turns you on, arms simply on the ground as if to grab invisible sheets tight.

Without telling her what you're doing you start rubbing your cock head all around her vagina, pressing down more on her clit, and rub the precum all around. From her vantage point she thankfully can't see what you're doing. You're sure she'd freak out if she did. As it is, she looks nervous.