Whoever has sexual intercourse with his own wife, who is living separately, whether under a decree of separation or otherwise, without her consent, shall be punished with imprisonment of either description for a term which shall not be less than two years but which may extend to seven years, and shall also be liable to fine.
https://www.leadindia.law/bns-section-67-sexual-intercourse-by-husband-upon-his-wife-during-separation