“Not if I get my hooves on you first!” You boldly state, before jumping to grapple the mare by the neck.
However, you only get to see Knifepoint unimpressedly raise an eyebrow for a second before the larger mare swiftly catches you and slams you on the ground. The wind taken out of your lungs, you can do nothing before the big zebra pushes her arm across your chest and the other over your neck, effectively immobilizing you by simply leaning the weight of her front half on you. You’re left to stare at her satisfied smile over you while her heated breath wafts over you.
“Oh, Hearty...” she coos. “It’s so freaking easy to pin you down. You have no idea how much I enjoy this perspective, and being the one doing the ponhandling for once, and the fact that this is my new normal, all thanks to you. I’m gonna have a lot of fun for sure tonight, so I hope you’re ready to bear with me. Not like you have a choice at this point…”
“Bring it on!” You spit the words out, forcing a cocky smile through the mare’s choke-hold. “I’m gonna cover you in so much white you’re gonna forget you ever had black stripes once I get my hooves on you.”
“Woah.” She chuckles. “So that’s what it sounds like when a runt tries to talk big? No wonder that never worked for me on the thugs back home… But please, do keep that energy, Hearty, you’re gonna need it.”

There, the large mare unceremoniously locks lips with you, easily forcing her tongue inside your maw. She makes out with you without grace, her pushes on you making the back of your head hit the wooden floor a few times, but the warmth of her taste, her brashness, and the echoes of her unhinged moans though your fleshes make your mind burn and melt with arousal. 
Letting go of your mouth with a wet pop, Knifepoint seems satisfied by the numbed expression of lust her kiss left on your face.
“Alright big guy.” Knifepoint’s tone is mocking. “Before you somehow paint me white or something, there are a few holds I need to practice on you like I said. And I don’t know my strength yet, remember? I feel like you’re not gonna get too mad if I accidentally hurt you, so you’re gonna be my obedient little practice doll, alright? Play dumb at your own peril. I can take care of it if I dislocate something, but I’m not paying the healer if you break a leg trying to wiggle around while I work. Got it?” And after you nod meekly. “Good boy...”

True to her word, Knifepoint starts to try out more than a couple restraining moves on you. While she seems to have some grasp on a couple grapples, their efficiency end up boiling down to the larger mare being able to apply her greater weight on you. She is altogether making sure nothing breaks in you, though. Her sheer mass might knock the air out of your lungs, but she makes sure your joints stay in the right position, and loosens her grasp when you start groaning too much. And even though she warned out about taking initiative, you can’t resist placing a few kisses on the mare’s delicious skin during the acts, especially when you find yourself in a leg lock, which in the case of Knifepoint means your head is buried in cleavage.

It’s at that specific point that you can ease her into the idea of taking a first ‘break’.
“Can you restrain me completely between your teats?” Is a question you ended up both wanting the answer to. And while you whole body could end up being sandwiched between the massive mounds of mare flesh, you have to bend your neck down to achieve being completely encased in their warmth. And while their weight alone could allow Knifepoint’s teats to nearly immobilize you, they’re however sensitive enough even small acts of resistance would make Knifepoint a little too bothered. One can’t seriously hope to restrain somepony if every little movement causes them to moan in delight, can they?

After this experiment, you’re tasked to massage the two humongous tits of the mare, electing more pleased groans from Knifepoint as she lets you to taste her meaty black nipples, which are each able to fill your mouth once turgid from your ministrations.

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Once she’s riled up from this foreplay, Knifepoint pins you on your back to then ride you to her heart’s content. The slapping sounds of her teats on her lap echo with each thrust of her buttocks on your hips. You’re soon shooting your load on the mare’s buns as she takes little care to make the pleasure last.
“Because you’re not getting off so easy.” The big zebra mare justified as she turns around, and pushes you against and up the wall with her bosom. “Pleasure me with your mouth and hooves while your dick can’t!”

You’re more than happy to oblige, kneading the mare’s giant teats some more, or being locked in another intense make-out session, or eating her out like a fine dinner. In all cases, these tasks quickly encourage your member to stand ready again, and so your big partner in crime can use you once more.

You rut her from behind, humping her with your hind legs dangling in the air over the ones of the taller mare. You fuck her as a missionary, hugging and nibbling on her massive udders while you do. You get ridden by her, feeling like to you’re imprinted deeper on the bed each time she slams herself down on you, all while squeezing her magnificent tits between your arms when they come down. You struggle to lift one of her thick hind legs while she’s on her side, but thrust into her still with all the energy you got. You cycle through all that and more severl times, Knifepoint seemingly determined to squeeze every last drop of energy and cum from you. Even though the mare extracted more juice from your shaft than you thought possible, you realize there’s way too much of her for your to cover entirely, and that might only be the beginning.

By the end of your romp together, you practiced many more ‘fun’ positions than ones for fighting. The huge mare ended up exercising the least amount of restrain when ramming herself onto you too, but since the creaks of the bed under you were consistently louder than the ones of your body, you both assumed you were overall fine.
At this point, you succumb not from injuries, but from exhaustion after humping Knifepoint for what feels like hours. While drenched in sweat herself, the huge zebra still stands, panting, while you feel too spent for even one more hip thrust.

“Aw. Looks like I’m too much for you to handle alright.” She chuckles, though more tiredly than she probably intended. “And to think you want to make me even larger while you can’t keep up me right now. That’s not really a winning move from you, Hearty.”
“I don’t know.” You breathe out, ready to fall asleep. “I feel like the biggest winner of the world right now after the time we just had. It just makes me want to double down on you.”
“So you’re not gonna learn anything, will you?” She theatrically shakes her head. “I’m not gonna complain then. You can bet it all on me if that’s what you want.”
“Sounds good…” You whisper as you close you eyes. And while you first hear a mocking sigh from the big mare above, a moment later you feel her weight make a pronounced dip in the mattress, as Knifepoint settles for the night right next to you.