The episode had a few slow moments during the investigation. The Angels knew one of them was the main target. Initially, they conducted working on the case in close proximity of each other. Then they realized it would be better to separate to found out who definetly was the target.
Kelly's girlfriend is the center of all this, but the Angels are not aware of this at the time.
As the Angels realize Kelly is the target they hurry over to her house.
The last five minutes of the episode Kelly shoots the hitman in the shoulder and he goes through her window and Bosely, cuts off Kelly's girlfriend's fiance in the car to apprehend him.
In conclusion, the fiance did not want Kelly's Girlfriend mention her husband to be because of his past and current embezzlement activities. He was going to marry Kelly's girlfriend for her money and embezzle her inheritance. I would have liked the girlfriend's part to be more involved in the script. It may have added more suspense to the plot.