To be honest, hearing Allen apologize so earnestly made Blanch feel a bit awkward. The reason things could be clarified was largely due to Allen's help, so his apology seemed unnecessary…
Blanch scratched the back of her head awkwardly and said, "It's fine; the issue has been resolved, hasn't it? Let's go find Leslie. As long as we confront her, this matter can come to an end."
Murder must come at a cost, and the consequences that Leslie and Isabella had to bear would naturally be determined by the law, while Blanch's innocence should be made public.
Allen felt the same way, but when they returned to find Leslie, she had already vanished, and before them stood Allen's father.
Leslie, unable to contact Isabella, had turned to Allen's father for help. Allen's father had always been somewhat partial to Leslie, and combined with her pitiful crying and "defense," he shifted all the blame onto Arabella.