James watches in awe as Gabriel's leaking cock jabs around the opening of the bitch's pussy, sensing the pleasure that's waiting for him and driven nearly mad by the smell of her arousal, Gabriel's hips stutter as the tips of his cock hits first one thigh then the other before he finds the warmest, wettest area. He thrusts violently, plunging his cock deep into the bitch, right to the hilt so that his balls slap forward and make contact with her clit. The bitch howls and struggles beneath Gabriel at the sudden and painfully large intrusion. Gabriel continues to pin her as his chest heaves, he waits a mere few seconds before he starts thrusting, and he really thrusts. The obscene sound of wet sex emanates from where the two pets have joined, pre-cum leaking quickly out of the bitch's pussy as Gabriel jackhammers relentlessly into her. He grunts with each thrust as the bitch continually whines. No less than 30 seconds go by before Gabriel's hips stutter, his knot swells and he jams it into the wet warm opening - but he needs more stimulation - so he thrusts even deeper, rubbing his knot inside the bitch. The bitch howls as his knot plugs her and suddenly he feels the pulsing of her pussy as she cums around him. His hips jerks a few more times before his knot swells fully and he feels his cock jump and pulse, he can almost feel the sperm as it rushes from his balls and shoots from his tip inside the bitch. He howls as he cums, still jutting his hips forward, making the bitch whimper in pain as she is filled so thoroughly.
James, latex gloves donned and lubed, moves to crouch at the side of the mating pair. He reaches forward to rub the bitch's clit in circles while he massages Gabriel's balls - each of the pair moan as Gabriel continues trying to rut as his knot swells another inch and his cock pulses as more cum is pumped from him. While continuing this extra stimulation, James narrates to the tablet, "Successful mount and entry, particularly dominant despite the female being tethered. Gabriel was unconcerned with the bitches responses as he made use of her - good lack of hesitation is promising. Around 30 seconds of rutting before knot expansion - successful planting of the knot accompanied by subsequent ejaculation."
As Gabriel continues to grunt, James continually massaging his balls sends his eyes rolling back into his head as he feels the cum wrung from him, the relentless pulsing of his cock pushing the pleasure he is experiencing to new heights that what he had ever felt. He vaguely feels the female under him writhe as she cums again, her tightening passage causes his knot to throb and his cock to jump wildly as yet more cum is pumped from him.
"Successful stimulation post-knotting - testicular contractions have continued and intensified alongside the bitch's orgasm. Breeding potential here for this male is excellent." James says nothing further while he continues to stimulate the pair in front of him. By the time Gabriel's knot loosens and he slips out of the female, he feels his balls have been thoroughly drained. He's surprised by the copious amount of cum that flows from the female's opening - noticing how wide it has been stretched by his knot makes his cock twitch, even though it shouldn't be possible after the amount he's just cum.
James smirks at the reaction and merely says, "Gabriel, you have the rest of the day in here - I will return for you at 5pm. Enjoy your time with this bitch." James turns to leave as Gabriel mounts the female once more, this time, sliding straight into her on his first thrust.