While the city of Edo was being made the population of that region had a ratio of 4 to 1 men to women. As shown by the poetry and records from the time, nobody could be sure that their own children were truly theirs. usually men’s wives have like 3 or more boyfriends on the side. If someone got ill, his wife had already picked her next husband. this was the normal life for the AVERAGE man of the time. Thanks to this everything will always rise suspicions of NTR.Good old Japanese NTR slop.
Why do they love it so much I'll never understand.
Especially since their idea of NTR is so wide that any female and any male (other than MC) spending time together is feeding their NTR boner.
Actually sometimes they are NTRed by female & female too... They are truly a diverse people.