A large strap-on cock.

Raven put on her favorite strap-on- the magic one that allows her to feel it like its real.

"Aw, you spoiled the surprise," she says with a little pout.
"Friend Raven has the most lovely of the cocks now. I feel the left out," Starfire says.
"If the surprise is done with, I might as well just do this. Azarath Metrion Zinthos!"

A strap-on appears on Starfire, just under her skirt. It is the same color as her skin, making it look like a real one would look (in some sort of weird fan-art).

"Oh my- is this one new?"
"It is. I made it just for you," Raven says, "Give it a quick rub."

She grabs it at the base and strokes it once. Her knees shake a little.

"I can feel it. It's like yours!"
"It is. Happy Early Christmas and late Birthday- not that you celebrate the latter."
"Ahem," you say.

The pair giggle and return their focus to Wonder Girl...

Starfire takes off her skirt and Raven tosses her cloak aside fully now. You take off your pants.

All 3 of you approach the young Amazon from each side of the front, presenting a cock to her 3 times over.

She needs no instruction and just starts sucking. She alternates between the 3 quite smoothly, giving all 3 of you pleasure.

Before any of you cum, you back up and look down at Wonder Girl.

"Beg us to fuck you."
"Please fuck me- I'm your ****. Make me ride you and fill me up with your cum. Amazons can't pregnant naturally, so fill me up many times over!"

You smile and now have to decide who fucks her first.