If a man has a maternal aunt who is only 4-5 years older than him, what is the relationship permissibility? Considering the similarity in age, does this change the permissibility of the way he can act towards his aunt? For example, is full hugging, holding hands, being alone in a room together, and kissing allowed?
Your mother’s sister is like your mother in terms of mahram rulings, irrespective of her age. However, if there is fear of falling into sin as a result of looking at her without her hijab, then you must not look at her without her full hijab.