Onit, my husband was sent back to live in the country of his birth when he was about 16. He was sent alone and at one time worked 3 jobs before joining the military - that then set him on the road to being who he is now professionally. Anyway, he has next to nothing to do with our childen and before I gave up trying to make it different he told me - they are big, what do they need me for???? He really doesn't understand why.
As you know I also live away from my birth family but we are very close and we never feel far away from each other but my husband will say to me - we didnt have our families, we didnt need them. I said to him but the difference between us is that I wanted mine. So maybe there is something to be said for the role our husbands fathers played in their life. But who knows? I usually have to have an answer and a reason for everything but funny enough having to know why he is a sociopath didn't really bother me that much - I was just so relived to eventually know what I was dealing with and use the info to set me on the road to recovery.
But if it helps I do know that when it comes to a sociopath they say that emotional trauma around the age of 15 plays a key part in who these people are. This link may help you to understand a bit better but Im not sure if posting it is the right thing to do.
depressiond.org/sociopath-sociopathic-personality-disorder/
Oh and if its of any comfort for you my in-laws have nothing to do with my husband and have told him - she is one of us and your children with her are our children. I would be very surprised if your in laws arent well aware of your husbands faults however they might just not be able to let you see that.