Fairly early on Natasha manages to slip her restraints while Steve is mating her, twisting sharply in his hold and pinning him in an awkward headlock that he can't use his strength to get out of.
Steve grapples with her for a long moment, the widow using every trick she knows to keep him subdued while she tries to twist and worm her way up over his shoulder.
When he feels her teeth graze the back of his neck, however – the female alpha attempting to subdue him and claim dominance – Steve sees red.
In a second Natasha is pinned to the floor, her grip slipping from his shoulders as the breath is knocked out of her by the force of the impact, and Steve is quick to tear himself from her hold.
Natasha doesn't get the chance to fight as Steve drags her back to the mating stand and pins her across it, tying her ankles and wrists hard enough that the skin beneath the ropes turns white.
She doesn't realize how much trouble she's in when Steve drags her mating stand into the bedroom and closes the door behind them.
The red-head's challenging snarl turns into a look of terror, however, when he roughly grabs her ass cheeks and spreads them.
“No… no, Steve, please, not there- Steve, it's not going to fit!” she protests, struggling helplessly against the newly tightened binds as Steve forces his thumbs into her sphincter and slowly pries her open. “Steve, please, you're going to tear me!”
“I'm not going to tear you,” he growls, still wanting to reassure her despite his anger. “But I can guarantee that you're going to hate this.”
Her next words turn into a choking gasp as he nudges the tip of his member against her, slowly stretching her around him.
Steve can't simply spank her like he did with Scott and Sam. She's a top level assassin – children's punishments are a joke to her.
So he's going to have to do something that will actually get through.
Natasha pleads with him as he works himself in deep and begins thrusting gently, watching her body tense around him as he stretches her open.
She doesn't seen terribly concerned that he's fucking her ass, however, so Steve ramps it up.
Her begging chokes off as he allows his knot to begin swelling within her, the tight ring of muscles at her opening stretched shiny around the base of his shaft as he mercilessly fills her up inside.
He doesn't bother taking it slow, his hormones pulsing hot and furious in his head as the need to assert dominance drives his knot to fill in record time.
He can see her belly bulging a little where the tip of his shaft is buried deep within her, and reaches a hand around to give himself a slow rub through her skin as she squirms helplessly in his grip.
He can feel her inner sphincter twitching around his knot, stretching like a rubber band as he forces her open, and the assassin makes a small choking sound as he quickly swells to his full size.
By the time he's done Natasha is gasping for breath in shock, struggling to accommodate the massive intrusion, and Steve only gives her a moment longer to adjust before he begins rocking his hips into her, pumping his knot mercilessly in her ass.
It's the first time that he hears Natasha scream and cry like Wanda.
By the time he finishes, Natasha is barely clinging to consciousness, and Steve takes enough pity on her to relocate her to the bed and loosen the binds around her wrists and ankles to a comfortable level before going to wash himself up.
Stuffing a plug in her ass is apparently the final straw that she can take, however, and Natasha faints dead away before Steve even starts to work himself into her tight slit for her daily breeding.
The assassin doesn't try to fight him again after that.
Fill: The New Pack (6/?)
Steve grapples with her for a long moment, the widow using every trick she knows to keep him subdued while she tries to twist and worm her way up over his shoulder.
When he feels her teeth graze the back of his neck, however – the female alpha attempting to subdue him and claim dominance – Steve sees red.
In a second Natasha is pinned to the floor, her grip slipping from his shoulders as the breath is knocked out of her by the force of the impact, and Steve is quick to tear himself from her hold.
Natasha doesn't get the chance to fight as Steve drags her back to the mating stand and pins her across it, tying her ankles and wrists hard enough that the skin beneath the ropes turns white.
She doesn't realize how much trouble she's in when Steve drags her mating stand into the bedroom and closes the door behind them.
The red-head's challenging snarl turns into a look of terror, however, when he roughly grabs her ass cheeks and spreads them.
“No… no, Steve, please, not there- Steve, it's not going to fit!” she protests, struggling helplessly against the newly tightened binds as Steve forces his thumbs into her sphincter and slowly pries her open. “Steve, please, you're going to tear me!”
“I'm not going to tear you,” he growls, still wanting to reassure her despite his anger. “But I can guarantee that you're going to hate this.”
Her next words turn into a choking gasp as he nudges the tip of his member against her, slowly stretching her around him.
Steve can't simply spank her like he did with Scott and Sam. She's a top level assassin – children's punishments are a joke to her.
So he's going to have to do something that will actually get through.
Natasha pleads with him as he works himself in deep and begins thrusting gently, watching her body tense around him as he stretches her open.
She doesn't seen terribly concerned that he's fucking her ass, however, so Steve ramps it up.
Her begging chokes off as he allows his knot to begin swelling within her, the tight ring of muscles at her opening stretched shiny around the base of his shaft as he mercilessly fills her up inside.
He doesn't bother taking it slow, his hormones pulsing hot and furious in his head as the need to assert dominance drives his knot to fill in record time.
He can see her belly bulging a little where the tip of his shaft is buried deep within her, and reaches a hand around to give himself a slow rub through her skin as she squirms helplessly in his grip.
He can feel her inner sphincter twitching around his knot, stretching like a rubber band as he forces her open, and the assassin makes a small choking sound as he quickly swells to his full size.
By the time he's done Natasha is gasping for breath in shock, struggling to accommodate the massive intrusion, and Steve only gives her a moment longer to adjust before he begins rocking his hips into her, pumping his knot mercilessly in her ass.
It's the first time that he hears Natasha scream and cry like Wanda.
By the time he finishes, Natasha is barely clinging to consciousness, and Steve takes enough pity on her to relocate her to the bed and loosen the binds around her wrists and ankles to a comfortable level before going to wash himself up.
Stuffing a plug in her ass is apparently the final straw that she can take, however, and Natasha faints dead away before Steve even starts to work himself into her tight slit for her daily breeding.
The assassin doesn't try to fight him again after that.