She cums 3 times.

As you keep fucking Raven, you can see that she's nearly about to cum.

She opens her eyes and says 'Kiss me.'

Starfire grabs her head and kisses her hard on the lips.
Raven cums with quite a gusher, no doubt lots of pent up energy finally being released.

Starfire breaks the kiss as Raven recovers.

"I...actually meant for HIM to kiss me..."
"Oh forgive the me," Starfire replies quickly.
"You didn't let me finish. I actually meant for him to kiss me, but...that was still amazing too."
"I'm not close to done and I don't think that you are either," you say, "I'll get you next time."
"I bet you will."

You resume fucking her and Starfire proceeds to kiss her all over her neck and chest.
Her people are physically-empathic, so when they make people feel better, they feel better.

No doubt this is a key reason why the pair are so close.

You grab Raven just above her hips and use the leverage to fuck her nice and hard, now that she's used to you and has already cum.

"Kiss me."
You lean in and kiss Raven on the lips hard as she cums.

"I don't know...if that was better than last time or not."
"It's not a question my ego needs an answer to," you say confidently, "What about you, Star?"
"I love the loving- no matter what."
"Well, if you've got one more in you, we can do a test."
You and Starfire nod.

More hard fucking as Starfire sucks on Raven's nipples.
You are definitely getting close, but want to please both ladies.

"Almost...there. Kiss...Starfire."

The Alien Titan is confused for a millisecond, but then does what she is told.
You kiss her back as Raven cums once again.

"I think...I like that one the most."
You and Starfire smile, before each sharing a quick kiss with her.

"Now...what about you," Raven asks, "You need to cum too."
"May I be of the assistance," Starfire asks.