Evadne Daley, who is expecting her husband's baby, said the couple had enjoyed a "fairytale wedding" less than six months ago at the New Testament of God Church in Hockley, Birmingham, which they regularly attended.
Selbourne Daley, 41, died when a Toyota MR2 went out of control in Birmingham city centre at about 9.35pm on Thursday and hit a group of pedestrians outside the Dome II club, injuring 12 people including the driver. Six have been detained in hospital with multiple injuries.
Mrs Daley, 30, said: "I fell in love with him the first time I set eyes on him and I knew we would spend the rest of our lives together.
"All he was looking forward to was to dote on the baby. The thought that he will never see it is too much to bear."
John Bunce, manager of the nightclub, said Mr Daley had worked at Dome II for about two years and was a popular character. He described the scene after the crash as "utter carnage.
"It was like a battlefield, people were lying everywhere, there was total chaos," he said.
Assistant Divisional Officer Iain McWilliam, of West Midlands Fire Service, said the timing of the accident had saved many more from serious injury or death. "Thankfully there was not a queue outside the nightclub. If there had been we would have about 150 dead."
Police said the driver of the Toyota had been arrested and detained for questioning. A second man was arrested yesterday morning and another vehicle has been seized.