"I would like to, but I don't know what can happen to you. I already told you that I feel the initial symptoms of Itch until today I didn't." Jenny said
"And? You never really noticed my teasing until today did you? I've been wanting a more intimate relationship with you for a long time, I didn't even care about the possibility of you having Itch. If you had told me about your condition beforehand and asked me to be your horse cock I would have happily accepted." Sally said
"I…I never imagined you felt this way about me. With you putting it this way I can't reject your invitation. But I wasn't going to fuck your pussy, I don't know what my male fertility level is and there's no condom that works on my cock. I don't want to risk getting you pregnant, I'm not ready to be a father yet." Jenny said
Sally got up from her bed and turned on the light in her bedroom, letting Jenny see that she was wearing nothing but a sheer nightgown. She then went to the mat on which her friend was lying, turned around with her back to her and with her butt close to the kitsune-girl's face said "So we go anal."
Jenny then pulled the blanket off her, showing that she already had her pajama pants down and her cat-canine dick more than ready for action. She took off all her nightwear and pointed to Sally's bed saying "Since you so want me to fuck you so lay down there so I can impale your ass with my spear."
Sally took off her nightgown and got on all fours on her bed. Jenny also climbed onto the bed and got on her knees behind her, aimed well at her friend's rear entrance and pushed her manhood inside. The Kitsune-girl fucked her best friend slowly going with her dick deeper and deeper, deciding to stop going deeper when her friend showed some discomfort.
"Don't stop, I want you to put everything inside." Sally said
"I can not. My cock is too big for you, I'll end up hurting you." Jenny said
"No it won't, I've been training for some time using bigger dildos when I'm alone, soon I'll get used to it." Sally said
Hearing her friend's affirmation, Jenny didn't hold back anymore and continued going deeper and deeper until finally having her entire cock inside Sally's ass. It was only a matter of time before she came and deposited all her seed deep in her friend's ass, which reached her own orgasm when she felt the hot substance inside her.
At the end of her orgasm, Jenny tried to get out from behind her friend, but she couldn't.
"What happened? we merged? Am I turning into your dick?" Sally asked as she felt the tug behind her
"No, I just got knotted on you. Although I think something would only happen if I came inside your pussy." Jenny said
Jenny sat on the bed with her best friend on her lap waiting for the knot to break and allow them to separate. They barely sat down and Sally started rubbing her pussy, mainly on her clit area.
"I don't know what got into me, I just came and I'm already horny again. I'm actually hornier than before." Sally said and started rubbing her pussy more willingly, pushing her fingers in such a way that she was clearly already masturbating. Quickly she came again.
As she had Sally cumming sitting on her lap with Jenny, the kitsune girl realized she could see her friend's clit, which appeared to be a little swollen.
At the end of the orgasm Sally immediately started masturbating again. "What's wrong with me? I've never been this turned on before. No matter how much I come I can't feel satisfied."
While she was immersed in endless masturbation Sally didn't seem to notice, but Jenny noticed that her clit was getting bigger and bigger, standing up straight and stretching an inch forward when the girl came again, at 2 inches she had another orgasm and came again when her clit was already 3 inches long. It was at this time that she changed and started to stroke her clit, which from this point onwards, not only got longer, also became thicker. Another orgasm occurred with 4 inches, this time making Jenny come too. When she reached 5 inches her skin began to grow over her clit making Jenny already have an idea of what was going on, although she still wasn't sure.
When Sally's clit reached 6 inches, practically covered with skin and veins that were starting to show, Jenny had no more doubts and said "Hey Sally, look, there's a cock growing between your legs."
Hearing this Sally snapped out of her trance and looked at the ear between her legs, where she saw that without a doubt what she was holding was more of a dick than a clit. "So that's why I'm so excited. Looks like his Itch doesn't turn me into his dick, he's giving me a dick." she said and touched her developing member again just to have another orgasm.
When another orgasm ended Jenny asked "Don't you think it's a problem that you're growing a dick?"
"No problem, not to mention that this is so good that... aaahhhh... I'm gonna come again." Sally said reached another orgasm. At this point the member was 7 inches and was definitely a dick, only the urethra was missing. At the end of this orgasm she bent over to look better and saw that her new cock was totally separated from her vagina, which had a new clit in place of the one that was changing. Even after all her developing cock was still rock hard and she went back to jacking off, for now besides the male member getting longer some lumps appeared at her base which were her new testicles emerging inside a ballsack that was forming.
Sally reached another orgasm when her cock reached 8 inches long, having at its base a tiny ballsack with marbles-sized testicles. Sally was still very horny and continued to masturbate, now moving her ass too when feeling that her prostate had formed. The balls grew to the point of rivaling Jenny's and her dick reached 9 inches, finally stopping its growth.
Jenny's friend transformation was completed with her urethra finally finishing forming and opening the hole in the tip of her new cock. At this time the bedroom door was suddenly opened and Sally's parents (they didn't know Jenny was there), who had heard sounds coming from the bedroom and were worried, entered and were chocked not only by the scene they found, but also by the male member that was between their daughter's legs now.
The girls were taken by surprise, but had no time to do anything before Sally reached another orgasm, this being the last and most intense of the sequence, as well as the one that came with her first male orgasm. Her movements had left Jenny on edge and she too came again.
With the end of their orgasms both Jenny and Sally were totally exhausted and simply fell asleep.