Mumin, no need to get too specific with the girls. The truth has a way of being revealed. Be the best dad that you can be, and one day they will look back and understand what really happened and who the catalyst was. While pointing the finger at your WAW would feel good, you shouldn't involve children in adult things. They way you've handled it with them is perfect.
M(52), W(53),D(17) M-20, T-23 Bomb Drop - Dec.23, 2017 Ring and Piecing since March 2018