help, looking for smut webtoon i forgot

help, theres this adult/smut/mature webtoon set in medieval fantasy, (Knights, royalties, nobles) where the FL (longpink haired)and ML (black haired)are married, the husband is cold and never paid the wife attention so wife rebels to experience smut pleasure so he found someone to fool around on a sort of adult bar but the guy is actually his husband in mask, and chapter one of that is depicting a time where they still havent cleared that and is acting like they theyre fuck buddies, even though theyre married and hadnt divorced yet (soon to be, bcos wife wants it), basically, the FL mailed her panties to the one she fools around with,, her actual husband (but she didnt know) and he get off on it chapter 1,, thats all i can remember,, i was gonna check if they now know all their shenanigans and pretend but i forgot the title