N palabra para C-man

The assignment for the crossword puzzle reads, "A weak or servile man." The first letter is C. The husband takes a long time to figure out what the word is. But he would realize it very quickly if he turned his head and saw his wife being fucked by a tough, hardy guy with a foot-long dick. Does he not want to humiliate himself or has his psyche turned on a strong protective reflex? Neither. And the lover will never know that he has become part of the elaborate masochistic game of the hopeless impotent...