Anal is the way to go.

"I've always been an anal enthusiast, you can ask Kairi or Namine about that." Xion wiggled out of her green bikini, "I think it's one of my best assets."

She sat on my lap, intentionally grinding her rear against my hard cock, "I think your friend agrees."

"He certainly does!" I agreed.

As Xion grinding against your shaft, my hands feel up her body, traveling from her silky smooth thighs, onto her DD sized breasts. My hand sinks deeper as I squeeze her perky nipples. I pull them together, feeling how erect they are. I nibble along her neck.

Xion bites the bottom of her lip, "I can't wait anymore!"

Xion goes on her hands and knees on the floor, and raises her ass as it jiggles from her movement. I can't wait and line my cock against her asshole. It's hot and already lubed up. Without any resistance on her end I thrust my dick into her ass.

"OH!" Xion gasped, "I-ITS BIG! MASSIVE!"

Her ass greedily takes in every inch. Xion grunts and moans as I repeatedly enter and exit with my cock. I feel her marvelous ass and slap it. I slap some more.

"Mm *slap* MmM *slap* Mmm. *slap* mMm!"

Her insides clench, her walls squeezes my cock hungrily. Its tightening all around. I can't hold it much longer.

"MM! HARDER!" Xion moaned with pleasure, her face against the floor, drooling with pleasure. "S-So big!"

"I've never felt an ass so tight and hot like this!" I said, feeling myself lost in pleasure, "I might cum at this rate!"

"Then cum! Fill my ass with your seed!" Xion begged.

I pound with everything I could muster.

"I'm-" I'm gonna cum.

"Don't hold it in, L-LET IT ALL OUT!"

"-cumming!"

"Me too!"

I came, my cock pulsating and shooting thick white ropes of semen while deep inside Xion. Each second that passes, more of my cum fills her asshole.

Her body quivers from the pleasure. Eventually, I pull out as cum oozes off my cock.

Xion catches her breathe as her orgasm subsides and your cum leak out of her ass and dribbles down her silky thighs.

"B-best...cock...ever!" Xion said while panting.

Despite blowing such a big load, my cock hasn't gone soft yet. I hear the nearby bushes rustling.

"I thought I heard someone having a good time.~" someone said.

"Whose there?!" I asked, "Show yourself."