This is a rather long story so hopefully you stick with me...
I was with my ex partner for nearly 9 years and we have one child. After a rocky start to this year, I found out he was cheating with numerous women. I found out by accessing my son's Ipad which my ex partner's Google account was logged into. I found out he had been on holiday with another woman and dating others. I also found lots of extremely concerning images including him cross-dressing, lots of adult content of him in various positions, images of groups of young women in public and most worryingly, some of very young children including those well under 10 years old. None of these images were pornography but distasteful images of children (one he took in public and some of local school girls). I haven't spoken to him since. I did contact the police and I have tried to contact some of the girls involved (one was aware of his 'hobbies' and his ex-wife experienced domestic abuse). The woman he went on holiday with has a Facebook and I did message straight away - it was delivered but I can't see if it was ever read; she never responded. My ex-partner is a text book narcissist who, if they are together, I am sure will access/control her social media. I wonder what your thoughts are on this?
I recently became aware of her Instagram but it has been 5 months since I found all of this out. Should I try one more attempt at contacting her, or let all of this go now and move on with my life?