Sex pair's 999 alert.
The lock on the manacles jammed during their romp and the couple could not get them off her wrist.
In a panic, the man rang 999 and asked the fire brigade to free his partner, who was in her 30s.
But he begged them to spare their blushes by not using their siren when they arrived at the house in Basildon, Essex.
One firefighter said afterwards: "We think it was a couple messing about and it went wrong. They were very embarrassed so we made a discreet entrance."