Man is different.
We can have 'sex' without 'love'.
Men love their wives/family but they still intend to 'buy' 'sex'. They have no intention to hurt their counterparts.
There's so much temptation in Mainland China. Always 'free' or 'cheap' 'sex'.
Women has always to take caution to 'alert' your husband that you will eventually know of the un-ethical sexual relationship, and definitely, such awareness may harm the relationship.
Always remind your husband, such as frequently phoning them up by yourselves or by your kids, in order to shelter them from any 'temptation'. Always tell them you love him & the family needs him.