Having some Uncle fantasties lately....

Whoops! Lots going on, so my posts are WAY behind schedule. It's ok, though, as I've been having a lot of great sex!
So.
I'm out running with my uncle. He's in town staying with us for a few days and being the only other runner in my immediate or extended family, we take jogs in the morning together. It's still early, and I'm always freezing when we leave. My nipples are so tight they ache under my t-shirt.
We finally make it out to the park where we turn around, and we've made great time so it's just barely becoming 'morning' instead of 'early morning'. Everything's still covered in dew, and our breaths still come out in frosted puffs. We usually stop here, high five, get a drink of water from the fountain and begin the sprint home.
"How are your legs feeling?" He asks. My calves are notoriously tight after a good run, and it's sweet of him to ask.
"Alright, I'm going to have to stretch them before we go back." He nods and takes another drink as I begin flexing my legs and feet, trying to relax the muscles a bit.
"Come here, let me help you."
He's walking towards the bathroom and assume he wants me up against the wall. But as I get closer, he leads me into the bathroom. I'm confused but follow him in a step or two.
As soon as I'm in he grabs he and shoves me against the sink so hard I know I'll have a bruise on my hips for days at least. He's got all his body weight on me and I can't push away from the sink. I try and slip to the side, but he grabs my arms and holds me in place. He's smaller than Daddy but much stronger, which I didn't expect.
"Stop it stop it stop it!" I yell. I know my Daddy wouldn't like this, but I don't have much of a choice right now.
His hands start to move under my shirt, and he's tugging on my sports bra roughly. I'm afraid he's going to rip it but he's much more careful- nothing that my Daddy might see when I get home.
I can feel his cock against me from behind, pushing into me. He doesn't talk, barely grunting or showing any signs that this is a struggle for him.
"If you stop struggling, it'll hurt less, but it won't turn me on as much." He finally whispers into my ear. I start to make noise and he pulls off my shirt and shoves it in my mouth, muffling any noises I make. As soon as the shirt is off, I know he sees my nipples, still hard, as he grabs them roughly, and starts to play.
I struggle against him, hard. I push and try to make him get off me. There are so many moments where I feel so close to getting free but he pulls me right back to where I am. I look up and there is a mirror directly above the sink. I look into it and watch him as he smiles, staring back at me.
He finally pushes down my pants and I try to wiggle free. He is rock hard, precum dripping onto my thighs. His fingers find my pussy and he pushes them inside, stretching me, making it ache.
"I want to know first-hand what your Daddy's been saying." He whispers, more than in control of the situation. He takes his hard on in his hand and shoves it forcefully into my twat. It hurts- Daddy usually goes a lot slower- but I don't pull away. I know it'll just hurt more, so I push back against him like I've been taught.
The worst part of all of this is I just know he'll cum inside me, and I still have to run home, feeling it dripping out of me as I run.
He keeps shoving his cock in me, harder each time. I ache, writhing underneath him and struggling as much as I can muster.
He pulls my hair hard, pulling my head back, forcing me to watch in the mirror as he stares at me, as his face tightens and gets redder. I can tell he's going to cum and I fight one more time to pull away, jerking my hips forward.
He finally cums, and I can feel it filling me. He's just barely groaning as he unloads inside me, gripping my hips so hard I feel like I'm going to be dissolved into a pile of violated parts on the tile floor.
He pulls out and just as I predicted, I can feel it dripping from inside me onto my thighs. He walks outside and I pull my clothes back together in the bathroom. I want to cry but what's the point?
When I walk outside, he's waiting for me, stretching.
"You're better than your Daddy described." He says and smiles, taking off on a run and chiding me from several feet ahead about how I'm never going to catch up at that pace.
I'm angry with myself about how much I enjoy his comment the rest of the way home.