delicacy prevented me from(I had an opportunity to repay Philip for his shameless lie but my delicacy prevented me from doing it in front of his wife and children. – деликатность не позволила мне
не позволила
ART Vancouver)
treading on eggshells(To act with great care and consideration so as not to upset someone, some situation, etc.: The littlest thing tends to anger my mother, so I feel like I'm always treading on eggshells whenever I'm at her house.КГА)