A husband cannot refrain from having sexual intercourse with a young wife of his for more than four months unless sexual intercourse is harmful or excessively difficult (mashaqqah) for him, or the wife consents to it, or he had stipulated a condition in the marriage contract regarding this. There is no difference in this rule, based on obligatory precaution, whether the husband is in his home town or not.
Therefore, based on obligatory precaution, it is not permitted for a husband to continue on a non-essential trip for more than four months without a legitimate excuse and without his wife’s permission.