I slept with my boyfriend’s brother and now I am pregant with his child.

Hi Sis Dolly plz hide my i.d i am 21 yr old gal living at vaal. My story goes like this – i love my bf nd he trully love me. One day i went To my bf’s place without alerting him nd i found his brother ,we started to chat nd exchanged numbers . He started to call me ,day and night i deleloped feelings 4 hm idk how. Again i went to my bf’s place nd i knew he was at work i slept with my boyfrnd’s brother and after dat he told me dat it shuld hv neva happnd , we promised to kip it to urselves nd now m pregant wit my bf’s brother idk wat to do pls dnt insult me . I need your advice