For the next few tens of minutes, I tried to apply her recommendation as well as I could. She asked me to change position at some point but still left me the initiative. We switched to another one whenever we stayed in the same position for too long. I experimented with several kinds of postures, including her lying on her back despite claiming it wasn't the most comfortable.
When she was on all fours, I had her tail right in front of me. I tried to caress it, appreciating her fur's soft and warm feeling, and she didn't dislike my gesture. However, just like she said, it didn't seem to be an erogenous zone for her.
The various positions allowed me to move inside her at different angles, and she sometimes seemed like she was quite into it. Yet, most of the time, she was watching over my effort with more of a benevolent smile than one of arousal.
The movements I wasn't used to felt quite exhausting and I ended up panting over her body, trying to get some oxygen back into my lungs. Despite my boner not relenting in the least, the rest of me had a hard time following my will.
"You did great. You lasted much longer than I expected for your first time."
"Huff, huff. Sorry, I don't think I managed to make you enjoy it much."
"That's not true. It felt good to me."
"You're lying."
"Not at all. Sex generally feels good. I think I'd eventually reach orgasm too."
"Really?"
"Yes. That would have taken more time but I was on the way. I'd be more surprised if a virgin made me cum hard and fast on their first time. Now, that'd be abnormal for sure!"
She laughed at her small joke and I grinned back. She sure knew how to lighten the mood.
"Now, what do you say about taking it easy for a moment? I'll ride you this time."
"So, you’re a bit frustrated about it."
"I won't deny it."
She looked at the hourglass, from which most of the sand had fallen.
"You've been pounding me for almost 50 minutes now so I crave that climax quite a bit. If that's fine with you, I'll make us come together within the next ten minutes and we can take a break after that. You're still the client so it's up to you, of course."
I liked her confidence. It was as if there was no other possible outcome.
"No worries, that's completely fine."
I needed the rest anyway so there was nothing to lose. Plus, I could learn from what she would do. We exchanged positions again and I lay down on the bed while she gave me a large smile.
"I wouldn't have proposed that to anyone but I thought you'd be all right with it."
She placed herself over my belly, one leg on each side, and aimed her vagina entrance toward my penis tip.
"Try to watch and feel what I do."
I nodded and she didn't wait any further. Taking my cock in hand, she placed my glans right at her cunt entrance and slid herself down my size. I trembled at the feeling of invading her depth once more while she closed her eyes for a second in appreciation. In this position, nothing was blocking the penetration and she dropped herself slowly until her butt was only a few centimeters from my waist.
For the first time since we started, I felt something blocking any further access at the end of her twat. There was like a sort of smaller entranceway, which my penis head ended up bumping into. Berki grinned while noticing my expression.
"Can you feel it? That's the entrance to my middle vagina."
"…Your what?"
"Hehehe. Everyone reacts the same way the first time. Do you know? Kangaroos have three vaginas."
"Seriously?"
"To be precise, our vagina divides into three "branches" deeper inside. What you're feeling now is the middle one."
"Huh…"
And here I thought I had chosen someone to have the most normal sex possible. How mistaken I was! Or perhaps there truly wasn't someone "normal" from my point of view, amongst species that were so different from mine.
Berki seemed to like my reaction. She moved her waist to the side, making my penis slide inside her. I was now bumping into another smaller entrance, different from the previous one.
"This is the left one."
She then made a wide movement the other way, my glans rubbing everything pleasurably on its destination until I felt myself in front of the last entrance.
"And this is the right one. Which one do you prefer?"
"What am I supposed to answer here?"
She giggled once more.
"Nothing! It's my turn right now and I like my right vagina to be railed. Are you ready? It's going to be tight. Try not to cum immediately!"
Before I could answer, she dropped her hips further down, filling in the last few centimeters down. My dick was sent deeper inside her, forcing her narrower right pussy entrance to accept me. I felt my tip entering an incredibly restricted canal, the pressure almost forcing me to ejaculate on the spot.
"Damn! Too tight!"
"Mhmm! Here we go!"
As soon as I was in, she started to move her butt. It wasn't large up-and-down motions like I expected but many tiny and rapid back and forths. She was forcing my cock to stay inside her right inner cunt entrance while fucking herself on it. The pleasure assaulted me suddenly, and I felt my seed rising through my balls at high speed. I ground my teeth to resist it while mustering my willpower.
Fortunately, she wasn't in a much better state. Maybe she hadn't lied when she said she was on her way to her orgasm because her level of arousal jumped to the top at high speed. Her face was slightly reddened, her breathing deeper, her eyes focusing hard on what she was doing. Her tits were jiggling violently with her motions, making for a beautiful view. Every movement of her waist forced her to release a small but intense moan of joy as she fucked her side vagina expertly.
"Ah! Ah! Ah! Ah! Ah! Ah! Ah! Ah! Ah! Ah!"
The contrast with her previous calm demeanor was dramatic and exciting. A minute later, sensing the two of us being close, she sent a hand to her clitoris to flicker it strongly. This was the breaking point for her. She buried her waist as far down as possible, my penis entering deep into her small entrance, and climaxed on the spot.
"Ah! Ah! Ah! Aaahhh!"
The already tight corridor contracted even further and this was too much for me. I let myself go inside her, exploding my semen forward at full force together with a low groan of pleasure.