Pop star Mika is holding vigil at his sister's hospital bed after she fell 50ft (15.24 metres) from a window, impaling herself on railings below.
Paloma Penniman, 28, lost her balance while sitting on the ledge of a third-floor window in Kensington, London, on Sunday morning.
She is in a critical but stable state after having surgery at Royal London Hospital.
UK newspapers reported the family was asking for privacy at this time.
Sources close to the singer said: "To say he is traumatised doesn't even come close. It is the stuff of nightmares."
