Finally, I found another recording from the same couple recorded at my former place in Munich some weeks later than the first one already posted...
You remember that the first recording contained Sybille`orgasmic moans when she was licked or fingered, but as described the girl was very attractive, so I was of course eager to catch her when she has sex with her partner. At one evening, I noticed from my balcony that the light in their flat was reduced, and I thought this might be a promising sign that some action on her will follow...
So I took my recorder and changed some floors down to their flat (took me about 2 minutes or so) when I became satisfyingly aware of her warm-up moans and started to record. Indeed he obviously penetrated her very soon afterwards, and you can listen to the bed creaking under his movements, and from the aspirating moanings of the girl you can recognise that its the same girl like in the first one.
However the guy is unfortunately very much in a hurry to ejaculate his hot material into her...

So the whole action is sadly already finished at about 1:20 or so. Of course I was expecting that he will continue to do some good job on her and bring her to the desired climax (as in the first catch), so I continued the recording looking for more...
Indeed the story went on, but unfortunately not as expected: She is obviously very frustrated (which I understand well) but instead telling him about her unsatisfac(k)tion they started to argue that he was so fast that he probably did neither come nor ejaculate. Finally, I was quite frustrated, too, that such a stupid and balky guy was able to have sex with such a sweet girl who is left behind her sexual relief at the end...
Some parts of the following conversation with some Bavarian accent

of which not everything can be decrypted here...
3:30 He "Wird Zeit dass Du auch amol kommst" (You should come as well)
She: "und Du erst mal" (You, too..)
3:35 He: "Nein, ich bin gekommen" (No, I came)
(...)
5:36 She: "Nein, nein" (No, No)
6:00 He: "Ich bin gekommen" (I was coming)
6:05 She "Da kommt nix raus, da ist ja gar nix" (There is no sperm coming out...)
6:10 He: "Natürlich, ich habs doch grad dahergspritzt" (Sure, I just ejaculated)
6:15 He: "Bist Du jetzt fertig?" (Want to finish to argue?)
6:25 He: "Wieso glaubst Dus mir denn nicht, was hast du denn?" (Why don`t you believe me, why are you so angry?)
6:40 She: "Da kommt nix raus" (There is no sperm coming out)
He: "Ich bin aber gekommen, kruzifix, und ich hab auch abgespritzt" (I came ...cruzifix

... and I have ejaculated)
6:50 She: "Warum warst Du dann so leise?" (Why have you been so silent then?)
7:05 He "dann hab ichs halt nicht, dann kann ich auch nicht zaubern, ich hab hier keine Kamera installiert, die die Vorgänge überwacht" (maybe I
did not, I cannot conjoure, I did not install a camera observing what is going on)
7:30 He "Was ist denn jetzt schon wieder, worüber beschwerst Du Dich jetzt?" (What are you complaining about?)
7:32 She: "I sogs doch" (I told you)
7:34 He: "So, ok. Ist es schlimm, hast Du Schmerzen?" (Is it so bad? Do you feel pain?)
7:40 She: "Nein" (...)
7:43 He: "Ich schwör bei Gott und meiner Mutter und allem was mir heilig ist..." (I swear by God, my mother...)
8:05 He: "Wieso soll ich denn keine Lust haben, mir Dir zu schlafen?" (Why shouldn`t I want to sleep with you?)
9:00 He: "Ich hab geschrien wie Schwein" (I was screaming like a pig) (comment of the author: That`s actually not true according to the recording!

)
9:05 She "Ja wo ist es dann? Ich kenn doch den Unterschied zwischen abgespritzt und ..." (But where is it? I am able to feel the difference)
9:25 He "Ich hab abgespritzt, ich kann nicht mehr sagen...") (I cannot tell you more, I ejaculated)
10:00 He: "Wieso glaubst Du mir denn nicht?" (Why don`t you believe me?)
10:20 He: "Schau mal da unten hin, da ist alles total glitschig" (Look, down there everything is totally slippery)
10:23 She: "Da ist alles voll mit weissem Zeugs" (There is a lot of some white stuff)
10:25 He: "Da ist doch mein Sperma" (This is my sperm...)