Looking back, I had parents who literally tried to control every aspect of my life.  As an adult I can draw the line.  Back as a kid and teenager, I knew no difference.  Hindsight, along with experience, is helpful.  With that being said, I draw the line to prevent an more “misery” in my own life or theirs.  As to whether I would “estrange” them.  That is circumstantial.  In regards to a lot of things I will just flat disagree with them, explain why, and let ends be ends.

If I were you, I would practice drawing a line, rather than estranging them.  Once a family tie is broken it is almost impossible to repair.  Not everyone has to agree with eachother.  You have to remember this.  Not everyone has to agree with eachother.

Avoiding the problem does not always solve it.  Sometimes it has to be confronted.  But if I remember your story correctly, your mother is full blown nuts.  Mental illness is mental illness.  Sometimes drawing a line does not solve things.  However, let us assume she is not fully bats~~~ crazy,  I think you would be better if you did attempt to draw a line and did display your dominance.  It is your family.  It is not your mother’s or sister’s or father’s/etc.  It is yours.  You, as an adult son, have a right to your say so.  If not more than your mother and definitely more than your sister.

You have to gain control over your own emotions before you establish control over others.  You have to practice self control.  I cannot advocate this enough.  To control the world, you have to control yourself first.  Joining the Marines, if I remember you correctly, should help some in this regard.  I will say this again, the only person who is in control is the person who controls himself.

With that being said:

As an MGTOW sometimes you just have to say to your family: “I am doing what I want.  You don’t have to understand it, just accept it and get over it.  I owe nothing to you.”