#redditstories #askreddit #aita #affairdiscovery #betrayal #familydrama #relationshipends #trustbroken  A person uncovers a year-long affair between their brother and partner, leading to an overwhelming sense of betrayal. In response, they decide to end both relationships. The story explores the emotional fallout, the complexities of family and romantic trust, and the difficult decisions that follow such painful discoveries.  redditstories,askreddit,reddit,aita,tifu,affairdiscovery,betrayal,relationshipends,familydrama,trustissues,emotionalpain,heartbreak,infidelity,relationshipconflict,familybetrayal,partnerissues,siblingconflict,endingrelationships,heartfeltdecisions,relationshipadvice,emotionalfallout