DG owes it to Becky, to give a victim impact statement at sentencing, to set the record straight. His words against her (calling her rude and disrespectful) and that he never saw NM act inappropriately towards her, have been used by NM's defence to illustrate why NM had a problem with her.
SH's mother said that NM constantly made inappropriate sexual remarks, so I doubt if he curbed the habit when he was at DG's house. He more than likely made inappropriate remarks to Becky. It's no wonder she had anxiety problems, she probably never felt safe in her own house, as NM was there so often, jumping out and scaring her, and threatening to kill her.
She needed protection.