Due to requests by my fans I am here continuing the story for the doctor is in in earnest.
Thanks again to Beartp and gash for their comments on the original. Thanks to kuchibear and beartp for their comments on the last pittance I called an update. I hope you all enjoy what is to come. 

The son (I’m calling him Thomas from now on I finally picked a name for him) whimpers and whines as his father says this to him but he defeatedly obeys his father’s orders as he is fully released from the restraints he puts his legs down and goes to stand but falls to his knees instead his legs shaky still from all the pain of what just happened. He dares not fight any further or disobey so he leans in mouth open awkwardly as he moves towards jakes length which is still sheltered in the chastity like stretcher for his sheath and he whines and so does Jake as it enters his mouth. With a little instruction from the doc he is soon sucking it decently enough and Jake is whining and his legs are a little shaky but he stays standing with some help from the doc. He lasts a bit longer for this but still only a few minutes till he floods Thomas’s mouth with clear sticky hot puppy spunk. This makes Thomas gags knowing what just happened and goes to try to spit it out but sees his father glare at him knowingly and stops. He gags but swallows it all down out of fear. The doc grins and pets a panting Jake. 
“So pup how was it getting sucked by him?” asks doc
“N-not as good as it was when you did it but still awesome…..” Jake answers panting slightly 

Doc pats Thomas on the head “good girl. Now what do you say to your brother?”

Thomas whines but begrudgingly says as he was ordered “t-thank you for yiffing me and letting me suck you……”
The doc grins and Jake blushes hearing him say that even knowing it was forced. The doc checks his phone and grins even more. Good news Jake your mom is running late which meeeeeans you get to play with our new girlfriend more!” jakes length which had softened some sprung back to life at the thought of it. Thomas whines and blushes realizing what that’s probably going to mean. The doc speaks again with a chuckle “and I’m actually going to join you!”
Thomas whines a lot hearing this news. Jake blushes deeply from the thought of it as the doc strips naked in front of them both. “Ok Jake….your choice you want her muzzle again or her tailhole?”
Jake is stunned seeing the doc entirely naked as well as fully hard again. Thomas whimpers nervously about his father’s size. After a few moments of being stunned Jake snaps back to reality. “Um….both felt really good……I’m not sure….” He cutely bites his lip thinking about it a moment and blushes as he answers “t-tailhole again definitely……” 
The doc grins and sits on the nearby exam table legs spread open a bit he motions Jake and Thomas over. Jake walks over on shaky legs and stands next to doc. Thomas awkwardly crawls over not used to his length flopping around freely or his balls not being there but he makes it there. The doc looks down to him “your gonna raise your tail nice and high for your brother here and your gonna be putting that muzzle to good use in my lap……” 
Thomas whines and for a moment looks like he is going to fight it but whines and raised his tail as high as he can and opens his mouth leaning forward towards his dad’s length to take it in but is stopped as Jake gets behind him. “Oh…..and your gonna beg…..like a good girl for your brother to yiff you and for me to let you suck me…….” The doc grins intentionally pushing his son’s buttons trying to see where the boy will draw the line. The boy whines and tears up a little from the idea of it “oh and you have to make me think you really want it……” 
Thomas whines and whimpers at this part of it tears rolling down his cheeks he sobs a little but he looks back at his soon to be brother “p-please b-brother……y-yiff my tailhole……I-I want y-your thing inside me…..” the entirety of that sounds somewhere between a sob and a whimper but Jake doesn’t much care he moves behind him and pushes in blushing deeply and he humps slow trying to enjoy it as long as he can. Thomas looks up to his father not able to make eye contact he just stares at his crotch and whines not wanting to do this. His father puts his paw under his chin and aims him up making him look him in the eyes. Thomas whimpers out “p-please let me…..s-suck you’re….” He is cut off here by a grinning doc who pushes his tip into the boy’s mouth not making him say the rest. He whimpers as it goes in but he sucks it like he did jakes. Jake still only lasts a couple minutes but he does manage to knot Thomas on his own this time whimpering and wrapping his arms around Thomas’s midsection to hold himself up as he shivers from the pleasure of it all. The doc murrs and teaches Thomas how to use his muzzle properly on a male. It takes about 10 minutes after Jake finishes for the doc to grunt and hold Thomas’s head in place as he growls and floods his mouth with his very thick hot wolf seed. There is too much for Thomas to be able to gulp down and some comes out his nose and around his lips seeing this the doc pulls out and plasters the rest all over Thomas’s face. One shot goes over his head and lands on jakes muzzle. Jake is embarrassed but licks some of it from his own face out of curiosity. He blushes deeply and says “s-so that’s what it’s gonna taste like when mine turns white?”

The doc chuckles “maby…..most guys stuff tastes a bit different. Did you like the taste Jake?”
Jake blushes but nods slightly “I-it doesn’t taste bad or anything…..just kinda strange….”
Doc nods and smiles. “glad you liked it pup…..” he leans down pushing back into Thomas’s mouth to be cleaned off as he licks the rest off jakes face “go ahead and pull your stiffy out of her Jake and lay it on her lower back…….”Jake doesn’t know why he says to but he does it and doc grabs the camera he had recording it all and stops the recording then once with Thomas sucking on his length takes a picture and once with it laying across Thomas’s face another picture making sure jakes seen in all the pictures and then once while having Thomas lick up the side of it. Ok Jake she should be here in any minute now. Last bit of fun for the day….stand here next to me….” 
Jake does blushingly his legs a little unsteady. The doc pats his head and starts recording once more with Thomas kneeling in front of them right over a drain in the floor his length soft and resting on the ground between his legs for the camera to see the doc chuckles “ok Jake this is where it gets a tiny bit gross but you get to pay him back for what he did to you at school….I dunno about you but squirting always makes me need to pee after…..lucky for you and me our new girlfriend here will happily drink it all up so there is no mess….open wide Thomas…..” Thomas tries to back away out of fear but a small growl reminds him who is in charge so he moves back where he was and whimpers loudly as he opens his mouth which is still coated in his father’s seed. His father gets Jake in place. “Go ahead pup…..” Jake aims and whines a little not sure if he should but a pat on the head from the doc reassures him and he sighs as he pees into the open muzzle of Thomas who drinks it down for the camera to see as his father joins in a little from the side it quickly becomes too much too fast and his father stops aiming into his mouth at all since he can’t and lets it coat the boy head to toe with a chuckle. Jake joins him and they finish quickly. Thomas cleans their crotches and lengths both up with only a motion to do so from his father. “Good girl. Stay….” He takes Jake and gets him dressed again leaving Thomas there to dry. He dresses also and helps Jake position his male hood out of his open zipper comfortably. “There we go pup and here is your doctor’s note saying everything I’ve told you already. Your mom is out-front. I will be bringing our girlfriend over later tonight ok?” Jake doesn’t even need to nor want to speak right now. He just hugs the doctor tightly for a bit then runs out to the car to tell his mother everything about his new sheath stretcher and nothing else not sure if he should. They drive off for home and the doc goes back to Thomas who is washing his head off in the sink awkwardly with his soft canine length hanging between his legs. His father growls “I told you to stay…..bad girl….” He spanks Thomas and picks him up bending him over the counter and raises his tail unzipping his pants making Thomas squirm. “now…..I’m gonna show you what it’s like taking a large male in that little tailhole of yours….lucky you your brother left it nice and slick for me so it should be a little easier on you…” Thomas whimpers and whines as he rubs against his rump to get hard again then pushes in making Thomas cry out as he starts to ravage him on the counter not being gentle at all he makes sure to hold it as best he can for as long as he can manage so Thomas learns his lesson good. It takes about 30 loooong minutes for him to slam his knot into the tight tailhole and pump him full of hot wolf seed. 

To be continued maby.