The man and woman, who were not named, fell about five metres from the first floor apartment, in the German city.
The woman, who is married to another man, insisted the pair were not having sex, despite reports from neighbors who spotted the couple in action before their tumble.
“We weren’t having sex. We were just fooling around. I can’t remember the fall anymore,” the woman told the paper.
In a bizarre twist, the clumsy lovers were taken to the same hospital where the woman’s husband was recovering from his own fall - from a roof a few days earlier.