My room was in a different floor and I obviously missed their warming up because I was lurking around somewhere else, but I was able to catch at least the end. I did not see this German couple, but I would assume from their voices that they are in their Fourties or so...
In the recording they are obviously giving a handjob to each other, at the beginning you can listen to her loud moans, and his statement "Now you came earlier than me.../Jetzt bist Du mir zuvorgekommen..." suggests that she just got her climax. Then he wants to come as well, and asks her to have a very close look on this upcoming event. She agrees to do so ("Ich seh Deinen Schwanz..."). After he came under intense moans, they are talking about the large amount and appearance of his ejaculate, however, I have my doubts that you need a translation for all the details
After this action they directly went to sleep, of course not before he has cleaned the overwhelming amount of sperm using a hotel towel taken from the bathroom...In a nutshell, I was happy to catch straight the right two minutes... when I was entering this floor, I came across the direct room neighbour of this couple who just left his room to get a beer at the hotel bar (probably he was aware of what was happening in the next room), and when the couple finished, he was returning with his beer, so this catch was not completely without risk...
I need it!