Imagine you're my most loyal knight, your current task is escorting me through several important trade routes for our kingdom so that I can learn them, unfortunately neither of us really planned on my horse getting an injured leg at the last minute. And of course, as a bit of a spoiled prince, I didn't wanna ride another horse. It just wouldn't feel the same. However, I was willing to compromise with sharing yours, which is how we've arrived at our current arrangement.
I'm sat between your legs on the saddle, back to your chest as we ride. The problem is that the way I'm sat grinds back against you deliciously when I move just right, and that's making this ride increasingly more difficult for you. It's on the third day that you snap. We've stopped to have lunch, and afterwards as soon as I stand up you pin me to a nearby tree "You are far too tempting Your Highness" and you start to slide a hand into my trousers "W-What are you doing?" I gasp out, voice a little shaky. In reply, your fingers find my tdick and start to stroke it, causing me to let out soft little moans and buck into your hand. Soon though, your patience wears thin, and you simply pull my trousers and boxers down, and before I can even react, you're deep inside of me. "Wait, hold onnnnnnnn-" my voice devolves into whimpers as you start to thrust in and out of me. My boycunt clamping eagerly onto your intrusion "I'm gonna cum soon my Liege, gonna fill you right up, and you'll be a good little prince and take it right?" You ask, and I can feel your thrusts start to stutter as I whine a soft "yes, yes, please" completely out of it, it feels so good being fucked open by you. You feel me tighten considerably as I gasp out my pleasure, cumming on your cock, in response you grip my hips harshly as you bottom out in me a final time, cumming with your cock held right against my cervix. Afterwards, sated, you pull my boxers and trousers back up, press a kiss to my tear stained cheek, and climb back onto the saddle, pulling me up shortly after. The rest of the ride is spent with my face flushing bright red as I squirm uncomfortably feeling your load drip out of me every so often. We still have so much of the journey left and you can't wait to spend more time together.