Why not just do both?

You squat down behind Diana's ass and take a closer look at her situation. Her hips are wedged into the vent tight. It looks like she's going to need some sort of lubrication to get her unjammed. You find yourself staring at her phat, wobbling asscheeks for longer than you should, and Diana is getting impatient.

"Hurry along Shad. We have to infiltrate this base quickly before we are all discovered!" she calls back to you.

"Yep don't worry I'm on it. I'll get you unstuck real quick!" you say, your nanobots retracting to free your now engorged cock, causing it to swing up and down a few times from the erection.

You reach out to grab Wonder Woman's ass and give it a good grope and feel and in the vent, Diana is flustered, but silent as you continue your physical examination on her. You pull her underpants down around her ankles, revealing her bright pink pussy and juicy looking asshole nice and puckered. You feel her tense in her asscheeks.

You start to rub your cock head up and down her asscrack and you hear her gasp in the vent. She knows what you're doing. You feel her cheeks loosen up drastically as she calms down, not wanting to cause such a scene to attract attention to you three.

"I'm just going to apply some of the sunscreen to her hips and she'll be able to slip right on through" you say through the radio to Barbara.

"Alright do what you need to. Any second wasted here is precious time." Barbara calls through.

You hear Diana in the vent moan, "Please put it in me~" You smack her asscheeks with your dick a few times before slipping it into her asshole slowly. You feel her tense up again and she lets out a short yelp. "Great Aphrodite Above!" she cries out.

"What's wrong Diana? Barbara calls through on the radio.

"The... sunscreen... is so... b... cold!" she talks through the radio as you slip further down in her prior unused hole.

"Don't tell me great Themiscyran Royalty can't handle a little sunscreen. Just shut it and take it." Barbara calls through, unaware of what's truly happening.

"Yeah Diana... Take it!" you moan as you pull back and slam into her full ****, making her cover her mouth as she screams out a moan into her hand. "Take it all!!" You start only picking up the pace with your thrusts gradually, Diana trying her best to thrust back as best she can.

The sounds of your balls smacking Wonder Woman's pawg ass echo down the vent, causing Barbara to check in. "Shad, what's going on up there?" she asks concerned.

"Nothing Barbara, just having some difficulty with Diana's Ass!" you moan as you get closer and closer to cumming. You pick up the pace further and start jackhammering her poor asshole, causing Diana to scream out, "BY THE FUCKING GODS!" through the vent.

"Almost there!" you call through the radio to Barbara as you feel on the brink of your orgasm. "C'mon Shad, you can do it!" Barbara says.

"Yes Shad! Do it! Do it!!!" Diana moans as an orgasm hits her and she starts convulsing on your dick and it sets you off. You shoot a single rope of cum up her asshole and you hear her moan at the sensation, before you pull your dick out and spray it all over her asscheeks, before rubbing it all over her delicious and reddened cheeks, making it all slippery and allowing her to slide down the vent to Barbara.

You follow Diana down the vent and regroup with Barbara, and the three of you enter the facility.