The cooperation agreement between the two gangs meant that it would be more difficult for the Golden Hammer gang to fall. Many people wanted the opposite, so they tried to break off the agreement.
Many gang leaders went to meet the leader of the Light Temple gang to convince her to drop the cooperation agreement with the Golden Hammer.
But she refused, claiming that she couldn't since they had already sworn on the matter and because she didn't want to continue to live in fear of the Golden Hammer gang.
What she did was not suspicious at all. In fact, her acceptance of the deal was reasonable, and many of the gang leaders would have taken the deal if they were in her place.
The Light Temple gang had been on edge ever since they became neighbors with the Golden Hammer gang. They have had to hire a lot more manpower, which has led to an increase in the wages that needed to be paid.