When she was about to leave the Jones Family after killing Old Jones, she accidentally entered a prison-like place to avoid the patrol in the castle and saw the seriously injured Bo Lang there.
She didn't want to interfere at first. It was only when Bo Lang begged her and said that he knew the way to leave the Jones Family without alerting the people on patrol that she brought him along.
The Jones Family was indeed difficult to deal with at that time. Otherwise, so many top killers wouldn't have died in that mission.
If she really alarmed the patrolling people, it would be very troublesome for her to escape.
Hence, she brought Bo Lang along. Anyway, Bo Lang was not lethal at all. If he tried to harm her midway, she would deal with him then.
Unexpectedly, Bo Lang really didn't lie to her. The two of them followed the path and left Jones Castle silently.