Is my boyfriend wrong for not telling me the girl he cheated on me with has been emailing him nudes?

He said she was a mistake and he has no interest in her but he could’ve told me she was still trying so i was aware and knew. He told me to block her but that’s it, i found out because he asked me to check his inbox for a verification code and i seen her several nude videos and pics

Is my boyfriend wrong for not telling me the girl he cheated on me with has been emailing him nudes?
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