You watched his transformation progress downwards from his already canine face and clawed paw-like hands, gradually gaining muscle as time passed, to his manly torso and six pack abs as his erect cock turned red. The head of his cock turned into a canine knot, and his shaft and balls all swelled growing a furry sheath in addition to all that. This also included incredibly muscular thighs, a fluffy wolf tail and a set of paws as feet.
You now stared into the deep yellow eyes of a werewolf whose fur was as black as the night sky, and whose cock was almost 1 foot long, with balls the size of golf balls. At this moment you were completely awestruck and a bit confused as you were trying to process everything, you were no longer the boyfriend in this relationship but now a busty weretigress woman with a large rack on your chest and an ass that any guy, or gal, would crave. Your girlfriend was the true boyfriend all along, and he is a werewolf who is far more pleasing to the eye than you ever were with his ripped muscles and large cock.
He still hand a hand on one of your tits and he gave it a light squeeze, massaging it in his hands causing you to let out a soft moan and purr like the large cat you were. "You’ve got quite the rack, double D... no, E cups I’m sure of it. You like how the feel too, just listen to my kitty purr." He teased giving your breast another light squeeze and you responded just like the last time.
"I... I... y-you’re..." You stammered out with cherry red cheeks and your boyfriend chuckled and said,"It seems I already have you impressed."
"H-How...?” You then asked as you finally got your mouth to say what you wanted it to.
Your boyfriend brought his hand up to your head and took gentle hold, stroking your soft cheeks and whiskers as he gazed into your eyes. "Let’s not worry about how, but... what next," He said then he leaned forward and hugged you tightly and whispered in your ear,"The next part is going to change our lives forever."
Your eyes widened as he said this and you asked,"W-What do you mean?"
He laughed at this and said,"What I mean is that we’re going to make beautiful puppies, or kittens... hybrid?"
"W-What?!" You shrieked and he leaned forward and shushed you and spoke to you in a seductive and calming manner.
"My kitten, it’s only tradition on a full moon when a humble and strapping wolf finds a female creature like yourself, to share every ounce of passion pent up in his bones. You can’t tell me that you aren’t curious either," he said as you felt the tip of his knot tease at the opening to your pussy as he inched closer and whispered,"how it feels to be on the receiving end of the shaft~" Upon hearing this you felt an unusual heat in your groin flare up causing you to growl and think about just that, and you then realized you weren’t just aroused by him, you were fertile, in love by animal instinct.
"I-I.... m-maybe?" You responded and your boyfriend gave you a large toothy grin and said,"There’s my beautiful pussycat."
You blushed as he said this and as he moved in and kissed you on mouth, filling your oral entrance with his tongue as you just sat there in awe. Your boyfriend gave you a curious look after this and asked,"What’s wrong? You didn’t kiss back."
You felt the heat flare up more intensely again and you moaned loudly and growled,"That’s because... I wanted to do this!" With this you pulled your boyfriend closer and caught him off guard as you entered his mouth with your tongue, locking his muzzle to yours yet again for a few long passionate moments before you released him and grinned then spoke in a seductive sultry voice,"Now show this sexy kitty cat the pecking order of the pack, Alpha~"
Your boyfriend looked to you and smiled now then said,"I love the new you, and I’ll happily make you submit. Just say when, my fertile kitty bitch."
You grabbed your legs and spread them out wide for your boyfriend and he watched with a smile on his face then you growled,"Call me a bitch again, and you’ll regret it, I’m not a dog like you, asshole!"
"Oh, kitty’s got sassy claws," Your boyfriend laughed then nodded to you and barked,"Alright, as long as I get to fuck that virginity right out of you, and into a litter! Now, here I go!"
Without a moment to spare you felt your boyfriend thrust forward into your feminine cunt causing you to yowl and scream as you fell back and your head hit the pillows. Your boyfriend held your legs wide as he started thrusting deeper into you, and you can’t help but compare this to when a dog humps your leg, except much more intimate. With each consecutive thrust you moan and growl and you watch as your boyfriend moves his hands upwards to your shoulders as he keeps pounding your cunt.
"You’re... s-soaaagh... big!" You snarled as you felt your boyfriend continue relentlessly as a show of dominance seemed to rush through his system. He leaned over you and continued his work as his balls slapped your thighs over and over again, and he grunted with every other breath he took to thrust inwards. Soon after that you felt him penetrate into the very depths of your folds, and your boyfriend's canine knot expanded inside of you and he looked to the sky, or ceiling, and howled as loud as he absolutely could blowing his load into your virgin cunt.
Meanwhile you roared, climaxing as your vaginal walls clamp tight around his rocket as a torrent of his seed spews into your unprotected womb. As he came, you felt his seed inside of you flood and overflow your pussy, and you felt as if an ocean put out the fires of your estrus, only to later flare up and cycle again in the near future. Your vaginal walls clenched tightly and practically milked every last drop of semen they could out of your boyfriend's shaft and you were both left panting like animals afterwards.
"H-Holy shit!" You exclaimed as your boyfriend flopped over onto his side next to you, panting with his tongue out.
"I know... that was a rush," He replied then you looked at him and said,"I love you!"
He looked back up to see your flustered face as you admitted it and he replied,"I love you too, but just for your information, I can’t really pull out... it’s a wolf thing."
"Urrgh! Yeah... your... head just... urrrgh!" You yowled struggling a bit but then your boyfriend took your hand and stroked your rear with his other one then he said,"Don’t worry about it, but next time I wanna try mounting that plump feline ass of yours."
You blush deepened and you laughed nervously,"W-Whoa now... l-let’s save that for another night babe..."
With this your boyfriend nodded and said,"Alpha huh? Gonna start calling me that as if it was my name?"
"I would, if you would just tell me your real one." You replied and he shrugged and said,"Nah, I like Alpha better, besides I can still just call you Kitten can’t I?"
You blushed as he said this and he rubbed his nose up against yours and chuckled. "Let’s get some rest for now kitty cat," He said with a yawn and your eyes widened,"W-Wait, what about..."
"Shh, don’t you worry about a thing now. Thanks to that costume your nice furry ass isn’t going anywhere in the daylight, or anytime for that matter." Alpha replied and you paused and asked,"N-Never?!"
"I’ll figure something out for you, me however... I’m not so sure since I’m a bit more natural. There were stories about special things happening when two werebeasts mate like this, but whatevs, we’ll cross that bridge when we get there." Alpha exclaimed with a yawn and you gave him a slight nod back and yawned too.
After this Alpha turned the lamp next to you off, and the light switch was conveniently just next to that one. The two of you pulled the covers over your bodies and curled your tails around each other, cuddling up to him while your breasts squished up against his body felt really weird but also right in a strange sense.
"Goodnight, red rocket," You said to him and giggled.
"Goodnight, pussycat," He replied back with a chuckle and you both slowly drifted off into slumber, and the next day at least you knew you were stuck as a weretigress, but Alpha...