"deadly" request

The Funeral Mass was scheduled at 9 AM. The deceased was a young man. He died suddenly from an accident.

I received a call from the parish office a few minutes before the mass.

A man was there with a special request.

"Father, is it possible that before you celebrate the funeral mass, you solemnize first the marriage of N., (the name of the deceased) with his fiancee?"

No answer.

Persistent request: "They intended to get married soon. But he died so suddenly. Is it possible, Father?"

Persistent answer: Silence.

I wonder how the dead can give a consent, answer clearly and truthfully, and finally make the vows of marriage "until death" (when he is already dead)?