eclipse, “because I did not want them to entertain the thought for even ONE SECOND that anyone was better than their own wives in any way”.
Uch In Vay if a guy comes to a woman’s friend for help with his wife’s flaws. That reeks of trouble. I dont know if thats Halachically permitted. Ive heard of many improper alliances starting innocently, EXACTLY like that. Lifnei Iver Lo Sitein Michshol. I think, with the best intentions, any woman (self appointed marriage counselor) involving themselves with a friend’s husband that way, is less Tzniusdik than those with dressing issues. I think the safest response would be “Sorry, Im not Mekabel and I’m not a marriage counselor”. That would give the guy the right message.