3 ideas
A noblewoman is positioned to mediate between her husband and his barons or subjects because she can soften his anger and offer the other side a face-saving path. Neither party would accept such a path from an open rival. Her influence works by indirection: she counsels privately, frames concessions as mercy rather than weakness, and lets the prince keep the credit.
A woman's good name is treated as her most valuable and most fragile asset. It is lost through appearances as much as through acts, because observers judge by visible conduct and the company she keeps. Prudence therefore means controlling what others can see and report, not only behaving well in private.
A wife should know her household's revenues and expenses in detail, audit stewards and servants herself, and keep spending within income. That knowledge lets her run the estate while her husband is away and protect the family if she is widowed. Delegation without oversight invites theft, so personal competence in accounts is framed as a core duty.