As they both started calming down a bit with Tony's rod still firing into Megan, they reluctantly began to speak.
"Oh man, I can't believe this. Did I really have you fuck me with no warning and practically no reason at all?" Megan asked.
Tony grinned and answered, "I wouldn't say it was with no warning. I saw it coming a mile away. And the reason is that we've found each other sexy since we met. Plus the fact that you smell ten times hotter than ever tonight."
"Ugh, are you still going back there? What even happened to you while we were doing it?"
"I don't know, but I guess I probably got another change. Some of them are supposed to be faster and less comfortable than others, especially toward the end. But shit if I ain't feelin' better than ever right now."
"Whatever, Tony. I gotta admit you're a pretty decent lay. But why are you so swollen inside me? Are you sure you didn't break somethin' down there?"
"Feels fine to me. Weird, but fantastic. But are you sure you're going to be okay? We don't exactly have access to protection here, and--"
"That's sweet, Tony, but I've got us covered in that regard. According to what they told me in my intake meeting, I would be cured of any existing ailments during my transformation, including any venereal diseases, and that would apply to you, too. Plus, I won't be fertile until after the transformation is finished, because my biology is in too much flux to sustain a pregnancy. They did tell me I could go into my first heat while I was changing, though, and it looks like that's exactly what happened."
"Huh. So that's what that smell was. I think I could get used to that."
"Easy there, stud," Megan taunted. "Let's get this night of passion over with before you run off to become a puppy playboy. Say, now that things are winding down, do you think you could get your weight off me and maybe try to, I don't know, make a graceful exit?"
"Really, Megan? You want me to leave already?"
"No, not yet, just maybe pull out so we can have some after-play."
"Sure thing, sweetheart, just let me, oof! That could have gone better."
"What's wrong, baby?"
"Oh, nothing Megan. I made it off of your back, but somehow I'm still inside you."
"I can feel that, sweetie. Now--ow! Why are you pulling that hard? Stop! That hurts!"
"Something's wrong, Megan! That swelling at the bottom of my prick. It's keeping me inside you!"
"All right, Tony, just calm down. Maybe this is normal for dogs! I don't know. I don't know, but let's just wait and see if the swelling goes down. It does still kind of feel okay inside me. Kind of nice actually."
"How can you say that Megan? I'm stuck inside you and like it! Actually, I guess it does kind of feel good for me, too. But you really think this is normal? You think dogs just start having sex and aren't allowed to stop? That doesn't even make sense! Does it?"
"Like I said, I don't know, Tony. All I know is that I want to try to enjoy this moment with you before we start freaking out."
And enjoy it they did. They talked about their previous sexual partners and laughed about the most embarrassing stories they could tell each other about unexpected things that could happen during sex. They were both glad they got to earn another story with each other before having to give up on their human sex lives for dog ones. At long last, after about 20 minutes, but felt more like an hour, Tony's dick returned to a manageable thickness, and he was able to pull out.
Tony said, "Whoa. I didn't know dog dicks were so freaking ugly."
"Whoa. Is that what you have now?" asked Megan.
"I hope so," he answered, "or at least I hope this is what a dog's dick looks like. I really don't want something to be wrong. Everything feels well enough."
"Well that's a promising sign, at least," Megan said, wrapping her arms around Tony's furry midriff. They cuddled for a while, and Megan eventually got a surprised look on her face when Tony bent down and started lapping at his larger penis with his longer tongue. "Tony, what are you doing?" she asked.
"I wanna clean it!" he said between licks. At first, she wanted to tell him that that's what the showers were for, but she realized this might be just the way a male dog does things, so she just went back to hugging him while he licked. The smell of sexual fluids hung in the air around them, and Tony was relishing the way they tasted on his transformed sex. Eventually, his entire male organ was fully withdrawn back into a fuzzy holster of skin attached to his abdomen. Tony understood that this was what his flaccid penis was going to look like from now on. Megan realized she could finally think straight again now that her insatiable loins were finally filled. Then they each realized they could smell their uneaten dinner that had been left outside their doors, so now they had another bodily urge to fulfill.