What is permissible for a husband to see of his temporary mahram relatives, and is it permissible to be in seclusion with them or to shake their hands?

Temporary prohibitions do not differ from other non-mahram women in the prohibition of looking and seclusion. Temporary prohibition means preventing marriage to a woman in a specific situation that ceases when that situation ceases, such as the prohibition of combining two sisters or a woman and her paternal or maternal aunt. The mother of the wife is not considered an example of temporary prohibitions because her prohibition is permanent upon the marriage contract with her daughter.