something like my fierce tigress wife, where the male mc is leeching off the powerful female love interest, not something like a domineering ceo wife or cultivator lover having great aptitude and being separated from the male mc
Maybe the short story 'Bunny Husband'? In the noval Repugia from ScribbleHub, one of the MC's harem member is kind of the woman you describe, but he isn't leeching off her