покладистый (VLZ_58); как шёлковый (As soon as Jones realized he could get in trouble if they reported him, he became putty in their hands. VLZ_58); послушный (Jane is putty in her mother's hands. She always does exactly what her mother says. VLZ_58); верёвки вить (из кого-либо VLZ_58); делать с кем-либо всё что угодно (VLZ_58)

putty in hands