They lived for almost two years around indus area together, alone except his army and advisors who were helping him consolidating his gains. Two years is enough to know if your partner is worthy of your affections. This girl grew extremely possessive of him. She couldn't bear to see him with other women. Seeing her condition he never let Agramahishi meet Helena otherwise it would be absolute chaos. Agramahishi had all the legal rights as she was considered the legitimate queen of the emperor. He never let Helena realise she was just a secondary queen.