It has been nearly 14 years since I left DS1's dad. DS has always assumed his dad was the 'injured' party and I haven't challenged this for several reasons the biggest 2 reasons being; I think it is really damaging to a child to hear one parent badmouthing the other and secondly my ExH & PILs are still in my head and I am still trying to please them.
DS seems totally uninterested in why the relationship failed. I don't know if this is because he thinks he knows the circumstances (that I left exH for DH). I also don't know if he remembers that things turned nasty and scary, in DS's presence, after I told exH that I was leaving (ds was 5). I didn't move in with my now DH until 18 months after and DS and I lived alone. DS also wasn't aware I had met DH for several months after.
EXH was having a relationship with someone else for part of our relationship/marriage (I don't know how long) he was also abusive to this person. This person is still in my/DS's life. DS doesn't know about this relationship.
DS does know that his dad has been totally unreliable as a parent, has never financially supported him and hasn't acknowledged birthdays or Xmas for years.
I have been ready to answer questions honestly when they are asked, but they haven't been asked. The trouble is, I know my DD will be asking these questions about her brother's mysterious dad and why we got divorced (she already has). I want to answer her honestly, but I can't divulge information to my DD that DS doesn't know.
Sorry this is long and I am being cagey about identifying information. It probably sounds like such a stupid non-dilemma. I've tied myself up in knots for years trying to do the right thing and be a good parent.