The Olympic Trials - Equestrian #4 (Commission) (Pixiv Fanbox)

Alice giggled and hopped up onto the feed box, laying her back against its cool metal. Trigger, well groomed from years of sexual training at The Facility, neighed loudly and perched his forelegs on the sturdy wooden post above Alice's head. "No fair!" exclaimed Felicity, "How come you get to have him inside you??"

The other little girl grinned. "Because I'm older and I have seniority! Plus you've already gotten to have horse cock inside you."

"No! Sparkles doesn't count, he was a unicorn! And plus you're only four months older than me!" Felicity pouted in vain. But Alice was already lifting her hips up and rubbing Trigger's cock at her opening. Felicity opened her mouth, wanting to protest her case more but just watching the scene in front of her was already making her moist as well. The horse could sense this as well, his huge cock pulsing and growing by the second. Quietly rubbing her clit with one hand, she lifted the horse's dick and guided it to Alice's tiny opening.

There was resistance at first...then slowly, inexorably it pushed deeper into the tiny ten year old's body cavity. Alice gasped and gripped the side of the metal bin for stability as she pulled her thighs apart with her other hand. Her breathing quickened. She'd never had anything this big inside her before. She could feel her walls strain and every nerve inside her pussy get rubbed raw against the huge cock inside her.

Her eyes peeked open just a bit between breaths. She could even see the outline of the cock throb upwards through her belly, distending and bulging it outwards.